I bought an 8525 used off ebay, with a broken screen listed as its only defect. I bought a replacement screen and installed it, but still no dice. I can plug the phone into my PC and it's accessible through Windows Mobile Device Center. It even let me upgrade the firmware to the official WM6 ROM. Still, no video.
I read in a thread here that if you plug in the phone to USB with no battery in it and a red light comes on, it means the hardware is OK, and with a battery in it if the light flashes red then goes black it means the battery is no good, and that the screen won't light in this circumstance.
So I bought a *brand new battery*, and plugged it into the phone--it still flashes a red light and doesn't turn on the green charge light, and the screen still doesn't light.
Can someone please offer some advice? Obviously the device itself works because it connects, syncs and takes software updates, but without a display it's as good as dead anyway. My new screen came with a new cable as well, so I'm pretty sure it isn't the problem.
Thanks!!!
Jason
From what you've described I don't think a broken screen was the only problem with the phone and that some of the internal electronics are defective as well.
I tend to agree, but I'm looking for a starting point to look at next. As I mentioned, the device works fine aside from the screen, so apparently there is something more, I'm just not sure where to look.
Thanks!
Jason
I had a problem with my LCD and tracked it down to a bung flywheel... I have no idea why that affected the lcd but I got a 2nd Hermes off ebay and replaced the flywheel off the old one onto the new Hermes as I liked the feel of the older flywheel better. This caused the new LCD to turn off too. I replaced the flywheel again and it worked... Have had no problems since...
Cheers...
Hi guys,
Sorry to bother you all with this, I am just anxious that there is something wrong with my X1.
The manual says all LEDs should flash at the same time. It also says that the charging status is all flashing slow multicoloured.
When charging, my X1 flashes the LED closest to the charger by itself (and red) and then flashes the other three seperately (multi-colored).
I have only had it 10 days so can easily get it replaced if needs be.
Could you tell me what yours does and how significant you think the problem could be to the life of the phone?
It is the only illumination that appears incorrect. All others work fine. The problem is when the phone is both on and off.
It's an X1i
Thanks!
crabby
LEDs flash separately when charging. First flash the one closest to the mini-usb port, then the other three alla together. Just notice that in my X1i they flash multi-colored, including the one near the mini-usb port.
I guess my paranoia makes it appear a different colour. But it's fine is it?
I have seen on another forum that someone had X1s where they all flashed together, but that after a few weeks started to flash sperately.
Does anyone know WHY the flash like this? I would much prefer the LEDs to flash together. I find the out of sync flash quite distracting considering all the others do it together.
crabby
Normal
It's normal for it to flash the one near the port seperate, it indicates charging, and also shows you where the port is if it's dark. I personally find it quite intuitive and useful. The one near the port flashes red, then the other 3 flash together, multicoloured.
my x1a flashes just like yours. the one near the usb charging port would flash, then the other three seem to flash at the same time.
Yippee!!!
I'm so glad it's normal. I just love this phone! Using it 'as a phone' I've got 4 days use out of it. But I know that should I need to get directions, write a letter, create some accounts... basically ANYTHING, the power is there in my pocket
Thanks,
crabby
{SOLVED}
mine has flashed same as all of yours. I think that multicolor changing interval is to short when flashing
Hi!
I tried to replace a cracked LCD display on my Nexus One, but now the colors are all messed up. Have any of you had the same experience? It's like insane! The black is like grey, and there's like these horizontal lighter stripes across the screen. Could this simply be that the LCD connector is not properly attached to the motherboard? 'Cause it was kind of tricky to push it back in place. Had several tries where the screen was completely black, because of the connector not being attached properly..
Cheers!
There is a good chance you dont have the connector fully seated. There is also the possibility that you got a bad screen, where did you get the new one?
I bought it over at DHgate. I sent them an email, but they said they tested each screen before sending it out or something. But should it be THAT hard to press the connector into place? I've been struggling with this for a few days now.. I've also checked that none of the pins are damaged. Atleast what I can see without using some form of magnifying equipment
The connector on my phone just snapped in, as in you could feel it pop in and knew it was making contact, I really believe that if you could see a good connection you have a bad screen, try and take pictures of what it looks like when running
Did you get the right one?
AMOLED or SLCD?
Here are some images.
It doesn't look that bad on the images. Sometimes there's also flickering on the screen, but it stops after a few minutes of use.. Hehe.
I could feel the snap myself when i pushed the connector in, but it's still crap..
On my Dell laptop I have a similar issue where sometimes when the screen connector is pushed all the way in it shows weird colours just like in your pictures (sometimes also lines or other artifacts). For me the solution is to wiggle the contact with the laptop running until it is sufficiently loose where all pins make good contact.
I also remember similar artifacts when an iPhone I fixed had poor contact.
You could attempt inserting the connector with the phone running, but beware of static, and also note that not all electronics like being powered up that way (i.e. I'm not responsible if you break it more than it already is ).
Thanks for the tip, xdZKu7, but no luck. It was either flickering/tweaked colors, or nothing.. I don't want to waste any more money on this phone now, so I'm thinking of investing in a DHD instead =) And this time with proper insurance!
I bought this thing first off of Amazon, and it was backordered... So I canceled and ordered from Newegg. Fine, i have to pay for shipping, and wait longer, but whatever.
I get the tablet, so excited, and i notice first that the screen would switch orientation when it shouldn't have. Like if i have it in landscape, then lay it flat on it's back, it would go into portrait. This could be recreated every time, so it wasn't just a fluke. I installed Asphalt 8 Airbourn and tried to play. I held the tablet flat, then all of a sudden when the car took off, it took a sharp right and ran straight into a wall.
Great... the accelerometer is broke. Also i can see the backlight flickering a little bit.
I request an RMA from Newegg and they said it'd take probably about a week to get it back. Get it processed, about to go take it back and check their site to see if it's in stock still and it's sold out. I get on their chat to make sure and they said it's backordered, so i'd have to wait for it to come in or switch it to a refund. So i switched it to a refund and by that time, Microcenter in my area had them in stock so i dropped by and picked one up.
Go it home and it was acting fine, until i installed Asphalt again and then it ran the car into the wall again... Also, again, i can see the backlight flickering. Starting to get depressed, i contact Nvidia asking if this is a common problem and then they said it was the first they'd heard of it. They tried Riptide GP2 and said it worked fine on their test tablet. So i bought Riptide GP2 with my Google Opinion Rewards and tried it, the little water craft ran straight into the wall, just like the first tablet. They told me to try exchanging it again, and that they were sorry that i was having trouble.
I go back to microcenter, demonstrate what is happening, they give me a new tablet and tell me to install the game and test to see if this one does it before i leave with it. Their wifi was being crappy, so they gave me a USB Ethernet adapter and an OTG cable to connect to their Internet (it worked instantly, freaking awesome.)
Install updates, install app updates, install the game, it works... Finally have one that the Accelerometer works... I leave and go home, and the screen still flickers on this one too.... So thats the question part of this post, does anyone else have this tablet and notice the backlight flickering? It happens more often on darker brightness settings.
Other than the problems trying to get a working tablet, and the screen flickering, i love this tablet. The screen is really sensitive though, so when you're holding it and trying to hit edge of the screen, and you're barely touching somewhere else, it'll usually give you a hard time. The stylus is awesome, the screen can be very bright and easy to see out in the sun. The 1080p is a noticeable different over my 2013 N7 ( i can see the pixels in this tablet, i have very sensitive eyes and the ability to see very fine details) but it's still a great screen. the battery life at least for me is not as good as the 2013 N7, however it does make it through the day.
anyways... TL;DR: Love this tablet, had a pain in the ass of a time getting one that worked though. Also, does anyone notice the screen's backlight flickering like i do?
is it a continuous flicker or is it just slight changes in brightness when the screen content changes? there is a known "feature" called prism that does some kind of auto/dynamic brightness/contrast adjustment depending on whats showing on screen. there's a thread over at geforce.com about it. apparently it was introduced in a prior update on the other shield devices too so im hopeful its fixed. if its a true flicker and not just brightness changes, then its either defective or the backlight is pwm and you can see it. some people are sensitive to pwn backlights on regular computer monitors and can see the flicker. google pwm backlight if you're unfamiliar with the phenomenon.
It happens when the screen content changes, and i figured it'd be some kind of dynamic change.
it also happens when the screen has the content on screen constant. It's sort of like a pulse, sometimes it also gets bad for a split second. I don't really know how to explain it. it will be pulsing, then it will have a bad flicker then go back to pulsing. It gets worse the darker you make the brightness, and also when you turn on autobrightness (although im sure this makes it worse because it's trying to adjust the brightness in dark light).
I looked up the pwm backlight and it looks like it's mostly with LED backlights. Thats my guess of the backlight on this tablet. That makes sense though, because i can see a VERY VERY slight pluse on my work's Macbook Pro, and a slight pluse on my Nexus 5 too. I suppose that this might be the case.
I just don't see it being a defect because i've had three of them, from two different vendors and they've all done the exact same thing with the backlight.
I haven't noticed any screen flicker.
I am also comparing this forum with the N7 (2013) forum when it first came out.
Lots of people there seemed to have troubles getting a good one -- light leaks, touch screen issues (there were several firmware updates for this), dead pixels, etc.
At least so far, there seems to be fewer people (per captia) complaining here.
Speaking of touchscreen issues, I did notice something about my Shield Tablet...
I was using it in the evening, while connected to a charger. I suddenly had a terrible time typing. I had just installed Thumb Keyboard, so I thought that was the problem. Went back to the Google Keyboard. Still had trouble. Scrolling web pages was also slow/erratic. Reboot -- same thing.
The next day I took it to work -- lots of email, including lots of typing.. general usage, etc. --- all with no problem. Back at home in the evening, some games, Google+ (typing) -- no problem.
Later on I was surfing eBay, and again I could not type or scroll without a lot of problems.
I turned on Settings --> Developer options --> Show touches and --> Pointer location.
With my finger steady on the screen, it was showing lots of erratic movement, particularly in the vertical axis. Several mm of vertical error, and about 1mm horizontal. Sometimes clearly below the entire area my finger covered.
Then I realized that both times it happened I was connected to the charger (Travel Surge protector with 2 -- 2.1A(shared) USB outlets).
I disconnected the charger, and the problem went away.
Connected the charger, and after a few seconds, the problem returned.
I was using the included cable, and another 2.1A rated charger.
I changed to a different 2.1A rated charger, and did not have the problem.
Different cable, 1st charger -- No problem.
The problem is reproducible (although not always) only with the 2.1A travel surge protector, and the included NVidia cable.
I noticed that this thing will charge at nearly 2A. The included cable is quite long (as compared to the other cables I have laying around), but is not thinker. In fact it is thinner than other USB cables.
It's really too small a wire guage to run almost 2A for that length.
It is marked with the Shield symbol (Like the controller or the Shield Portable), and came wrapped in a thing that said "Use with", and the Shield controller symbol.
Was the wrong cable in my box?
How are other peoples cables marked?
Has anyone else noticed an erratic touch screen if you use it while charging?
Mine is marked the same as yours. I just notice the screen keeps poping on while it is charging for no reason.
Tapatalk
Linuxslate said:
I haven't noticed any screen flicker.
I am also comparing this forum with the N7 (2013) forum when it first came out.
Lots of people there seemed to have troubles getting a good one -- light leaks, touch screen issues (there were several firmware updates for this), dead pixels, etc.
At least so far, there seems to be fewer people (per captia) complaining here.
Speaking of touchscreen issues, I did notice something about my Shield Tablet...
I was using it in the evening, while connected to a charger. I suddenly had a terrible time typing. I had just installed Thumb Keyboard, so I thought that was the problem. Went back to the Google Keyboard. Still had trouble. Scrolling web pages was also slow/erratic. Reboot -- same thing.
The next day I took it to work -- lots of email, including lots of typing.. general usage, etc. --- all with no problem. Back at home in the evening, some games, Google+ (typing) -- no problem.
Later on I was surfing eBay, and again I could not type or scroll without a lot of problems.
I turned on Settings --> Developer options --> Show touches and --> Pointer location.
With my finger steady on the screen, it was showing lots of erratic movement, particularly in the vertical axis. Several mm of vertical error, and about 1mm horizontal. Sometimes clearly below the entire area my finger covered.
Then I realized that both times it happened I was connected to the charger (Travel Surge protector with 2 -- 2.1A(shared) USB outlets).
I disconnected the charger, and the problem went away.
Connected the charger, and after a few seconds, the problem returned.
I was using the included cable, and another 2.1A rated charger.
I changed to a different 2.1A rated charger, and did not have the problem.
Different cable, 1st charger -- No problem.
The problem is reproducible (although not always) only with the 2.1A travel surge protector, and the included NVidia cable.
I noticed that this thing will charge at nearly 2A. The included cable is quite long (as compared to the other cables I have laying around), but is not thinker. In fact it is thinner than other USB cables.
It's really too small a wire guage to run almost 2A for that length.
It is marked with the Shield symbol (Like the controller or the Shield Portable), and came wrapped in a thing that said "Use with", and the Shield controller symbol.
Was the wrong cable in my box?
How are other peoples cables marked?
Has anyone else noticed an erratic touch screen if you use it while charging?
Click to expand...
Click to collapse
Yeah, there are a lot of devices that will freak out when you're using different chargers. I was going to tell you to go back to the Nvidia cable and charger that were included with the device to see if that fixes it, but it looks like you've found out that the charger was the issue.
I'm still unable to tell if it's the PWM Backlighting method that was brought up earlier or not. I can't get anyone else to see it though, and after three devices, i'm starting to feel like it's something that is normal.
pencil316 said:
Mine is marked the same as yours. I just notice the screen keeps poping on while it is charging for no reason.
Tapatalk
Click to expand...
Click to collapse
Same thing happens with mine. While charging the screen will frequently come back on and then go off again in a few seconds. I haven't noticed the behavior when it's not charging. It's almost like something is running in the background causing it to wake up when charging.
bluejay2345 said:
Same thing happens with mine. While charging the screen will frequently come back on and then go off again in a few seconds. I haven't noticed the behavior when it's not charging. It's almost like something is running in the background causing it to wake up when charging.
Click to expand...
Click to collapse
Check if your bluetooth is on... Mine only does this when I leave my bluetooth controller connected.
No blue tooth is off
Tapatalk
I've noticed it slightly in low brightness but not as bad as the Tegra3 based N7 and TF700t. I'm guessing it has to do with prism if that's the case.
Sent from my SHIELD Tablet
Screen "Flicker" is the auto brightness, try changing to a manual brightness. I have noticed the orientation is very sensitive, sometimes when sitting down or moving a bit it will flip orientation on me, seems overly sensitive, whereas ive used other tablets that were not sensitive enough. Sounds like you may have had a few bad ones but the screen "issue" seems to be common, the light sensor seems to be overly sensitive (assuming changing to manual brightness resolves your case).
Eat it iPhone said:
Screen "Flicker" is the auto brightness, try changing to a manual brightness. I have noticed the orientation is very sensitive, sometimes when sitting down or moving a bit it will flip orientation on me, seems overly sensitive, whereas ive used other tablets that were not sensitive enough. Sounds like you may have had a few bad ones but the screen "issue" seems to be common, the light sensor seems to be overly sensitive (assuming changing to manual brightness resolves your case).
Click to expand...
Click to collapse
I haven't noticed any type of flickering on my TN7 or my new shield tablet. This could partially be because most of the time i have the brightness setting to manual. Its seems as when i have it on auto the screen is just a little too dim for me. Although, when using the tablet outside i usually have it on auto and the screen chooses the correct brightness so it can be best viewed.
As I mentioned, I haven't seen anything I would call a "flicker", but I am glad someone mentioned the auto brightness.
To me, the auto brightness seems a bit "hyper" -- too much gain.
A slight change in orientation to or away from room lighting causes a drastic change in screen brightness.
The same for a shadow from my thumb if I hold the tablet in landscape.
I guess it could cause a flicker, but it depends on the context of timing --- Kinda like "the dinosaurs died out quickly", vs. "the quark decayed quickly".
Also I want it to be clear that I am not complaining about my Shield Tablet. It's just that xda-forums are a place where things are discussed in minute detail. It is not a problem, issue or complaint.
I have no interest at all in using my Nexus 7 (2013) (or any other Tablet) since I got my Shield Tablet.
The weak wifi appears to be the priority focus Nvidia is now giving the tablet. Question is will they go into denial mode like Asus did with the T700, or address early and revise the design IF needed. Sales were badly impacted for the T700 and a high return rate, per Best Buy.
Hopefully a simple firmware fix, but weak wifi is almost always antenna related for devices like this.
rushless said:
The weak wifi appears to be the priority focus Nvidia is now giving the tablet. Question is will they go into denial mode like Asus did with the T700, or address early and revise the design IF needed. Sales were badly impacted for the T700 and a high return rate, per Best Buy.
Hopefully a simple firmware fix, but weak wifi is almost always antenna related for devices like this.
Click to expand...
Click to collapse
I don't think any of the shield tablets I've used so far have had Wi-Fi problems.
I have a similar issue. Check it out here:
Shield tablet screen defect: http://youtu.be/PUP_zAgpbxs
I have been on and off the phone with Nvidia trying to get them to ship me a new one for free. They refuse and I refuse to pay more shipping charges just to get a working device. Great tab otherwise. Just was unlucky and Nvidia has terrible customer service. I'm just returning it
markymark567 said:
I have a similar issue. Check it out here:
Shield tablet screen defect: http://youtu.be/PUP_zAgpbxs
I have been on and off the phone with Nvidia trying to get them to ship me a new one for free. They refuse and I refuse to pay more shipping charges just to get a working device. Great tab otherwise. Just was unlucky and Nvidia has terrible customer service. I'm just returning it
Click to expand...
Click to collapse
Man, I'm glad I don't have that issue. That looks like some sort of video driver.
bryctucker said:
Man, I'm glad I don't have that issue. That looks like some sort of video driver.
Click to expand...
Click to collapse
Tell me about it. Its been like that since I first turned the tab on 3 days ago. Nvidia refuses to acknowledge my issue and insists I pay return shipping and a restocking fee. I don't understand why I should pay more than every other customer just to get a properly working device. Nvidia has pushed me away from sticking with this tablet.
The flickering when the content changes is probably Nvidia's PRISM at work. Basically, it tries to optimize brightness and colour so that power usage is reduced.
Instead of maxing the backlight and telling the pixels to display dark grey, it dims the backlight and tells the pixels to display light grey, saving power.
It is an advanced form of autobrightness, and I think it can be disabled. But a continuous flickering should not be caused by this. This should happen only when the screen is refreshed.. like new page or picture
---------- Post added at 08:32 PM ---------- Previous post was at 08:29 PM ----------
markymark567 said:
I have a similar issue. Check it out here:
Shield tablet screen defect: http://youtu.be/PUP_zAgpbxs
I have been on and off the phone with Nvidia trying to get them to ship me a new one for free. They refuse and I refuse to pay more shipping charges just to get a working device. Great tab otherwise. Just was unlucky and Nvidia has terrible customer service. I'm just returning it
Click to expand...
Click to collapse
That IS a probelm.. for some reason the bottom is getting clipped and being sent to the top.. send them a picture.
I don't have the flickering problem either...but the tablet used to wake up constantly when charging ...but after I did a factory reset everything is fine now .... My only complain is the poor WiFi performance
My Nook STR display looks like it has worn out or faded out.The (black) colour seems worn out , dimmed and heavy ghosting.(even after shut down, see the attached images).I can recover it bit by refreshing the scree (everytime I turn a page) but it is annoying and distracting.And this happen after about 5 min of booting and soon after nook start it look ok (but dimmed a bit)
This started to happen about a month ago and I have been using my Nook for 2 years now without any problem.
To solve this I restored it using the Nook Manager but the problem remains.
Please give me your views and advice. I am suspecting a hardware problem.
Note I don't use any apps like NoRefresher or FastMode.
[I'm new to this thread posting and apology for mistakes]
Thank You in advance
https://my.pcloud.com/publink/show?code=XZRX5RZfborCh0jJ00V1zcOvKWHc7gwGIfy
https://my.pcloud.com/publink/show?code=XZdV5RZEdsmMHOOSfLRcde3suMgH0CrGBR7
https://my.pcloud.com/publink/show?code=XZiV5RZtRpXAJo8To49VJ8B9UtopRqExIW7
https://my.pcloud.com/publink/show?code=XZNV5RZVSgEsKNokHHPGt15BRzBA0J82Pey
Somebody like to help Please
I'm no expert but I can't imagine that something like that is NOT hardware-related.
NookST Student said:
My Nook STR display looks like it has worn out or faded out.The (black) colour seems worn out , dimmed and heavy ghosting.(even after shut down, see the attached images).I can recover it bit by refreshing the scree (everytime I turn a page) but it is annoying and distracting.And this happen after about 5 min of booting and soon after nook start it look ok (but dimmed a bit)
This started to happen about a month ago and I have been using my Nook for 2 years now without any problem.
To solve this I restored it using the Nook Manager but the problem remains.
Please give me your views and advice. I am suspecting a hardware problem.
Note I don't use any apps like NoRefresher or FastMode.
...
Click to expand...
Click to collapse
If the problem remains after you did a "factory restore/reset" then it is most likely hardware related.
My NST had ghosting issue when I was experimenting with FastMode/NoRefresher but it went away after I did factory reset and went with a less exotic kernel hack.
Thank you for your response guys
I think I could zoom in the problem.
I took several screen shots using the screen shot app in one of these threads
Surprisingly those images are perfect.
I think the software is working fine.
So the problem is in the display or the display driver. And I notice that the e ink display has becomer darker even when the Nook is power off.
Is there any way to test the display driver ?
Hmm, that looks strange.
It's certainly not the frame buffer, but you already proved that.
Dumping the frame buffer will give you a nice, clean shot.
It could be that the (plug-in) display itself has a problem.
It could be that the voltages out of the (electronic) driver are screwed up.
It could be that the VCom or the EPD waveforms are screwed up.
The first thing that I'd try would be plugging in another display.
I'd also check the dmesg to see if something happened.
You should see stuff similar to this (editted) version:
Code:
DSPTrace:=== DSP: Load waveforms for t = 25 ===
DSPTrace:=== DSP: EINK parser version 1.07 (MV5) ===
DSPTrace:-I- Mode Version: 0 INIT, 1 DU, 2 GC16, 3 GC16(r), 4 A2, 5 GL16, ...
DSPTrace:-I- WMTA = 000047 (hex)
DSPTrace:-I- Ranges: 0-3-6-9-12-15-18-21-24-27-30-33-38-43-48
DSPTrace:-I- [4] Loaded ID = 5, t = 24 - 27, Subframes = 38
Thank you Renate
I checked the dmesg log and found this part is different
DSPTrace:=== DSP: Load waveforms for t = 29
I am not an expert so I attached the log.
Testing with another display is the most reliable method but that takes time as I have to import one from China.:crying:
So is there anyother way to check the display driver ?
I checked the display cable it is perfect. I am really confused but also VERY curious to figure out this mystery
More pictures of disembled display ( isn't is look strange the ghosting even when no power)
No, your dmesg log looks fine.
It's just that your room is warmer than mine!
It looks pretty low-level, driver voltages or display.
I'm sure somebody who works for the display manufacturer could tell you in a second exactly what it is.
Renate NST said:
No, your dmesg log looks fine.
It's just that your room is warmer than mine!
It looks pretty low-level, driver voltages or display.
I'm sure somebody who works for the display manufacturer could tell you in a second exactly what it is.
Click to expand...
Click to collapse
Thanks Renate
I think the only way to check (or solve) this issue is to plug a new display.
I was reluctant to spend on a display (nearly $25):crying:
But I ordered one from ebay and now waiting for it .
However, do you think the weather has any effect on the eink displays ?
I found a similar thread from mobileread forum. One poster reports a similar issue with kindle and sony readers.
Permanently screen fading over time problem in e-ink readers - MobileRead Forums
Several posters say they are in Asian countries.So I am also in asia (Sri lanka) So I wonder whether there is a connection.
I could tell you to fiddle with the EpdWaveforms and stuff, but that is a bit of black magic.
Your waveforms are apparently happy and loading.
I don't remember if B&N really set the Vcom on their devices before they left the factory.
The good thing with playing with the Vcom is that it's easily editable.
You said that you took your Nook apart.
Did you see the sticker on the back of the Epd connector?
That tells you the common voltage to the panel, around -2 Volts.
(The barcode says the same thing in Code128B, "-2.25".)
That should correlate to the value in /rom/devconf/epdVcom
You can try changing it if it doesn't.
It probably won't make a big effect, this is more fine-tuning for gray scale.
In my case:
Code:
echo -n "-2250" > epdVcom
(The number is in millivolts, with a minus sign.)
I dunno, put your Nook in the fridge and see if other waveforms work better.
The voltage is the same Renate. But I don't think there is a problem with the Rom and other software stuff.Because I did a complete system restore and the problem remains.
What really bug me is whenever I boot it (or reboot) the screen become ok with clear text.But after about 10 min (this time varies) the problem happens.
I think it is difficult to troubleshoot without a new screen.Plus I haven't seen people complaining about faulty motherboards.This makes me hopeful. (correct me if I am wrong on this)
Anyway Thank you Renate for your time and effort I saw you always trying to help many posters here. Keep up the good work!
Update
I got a brand new display from a ebay seller and my Nook is better than a brand new.
The fading issue is in the display.
The new display is whiter and has better contrast than the orginal one.
The best thing is I can use Renate's Temblast Reader without complete Refresh.
I don't know whether the new display has high DPP but I am more than happy.
I think the weather has an effect on Eink displays.
Thank You Everybody for your kind consideration and advice specially Renate. (Renate look forward to see an updated version of your fantastic Reader app with dictionary and bookmark)