Lumia 950 does not start - Microsoft Lumia 950/950 XL

Hi lumia owners
I had that issue yesterday when the phone just turned off directly and does not want to start by pressing power button.
During the issue i was using viber and messanger (fb) and vivid browser.
Phone is running the latest insider previw "feuture 2"
And i am sure the battery was ~60 % while the charger is plugged in.
The heat was not too high nor low.
I did some research but all the tricks didnt help.
Maybe i miss something.
Well, the phone only vibrate once i plugged in the cable, pressing the power button -or vol down + power button- (while plugged) vibrate after ~10 sec but nothing , while doing the same process without the cable make. no vibrate or anything.
If any one know how to fix this its gonna be a big help to all, thnx in advance

put phone on charger some time (30- 60 minutes) and try volume minus + power trick... if battery level too low, phone wont boot
if nothing helps, use Windows Device Recovery Tool.

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When i'm holding the volume down + power button, and inserting the USB cable, the red light is coming up, and it's Solid Red Light, and after about 10-15 second, it disappear. i sent it to one private lab, and they didn't succeed to fix it.
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Simulate a battery pull by holding volume UP and power button simultaneously for one minute, see if that helps get you back running to the point you can at least charge it up and factory reset.
I've had the Red light of dead yesterday because i had critical battery level and didnt charge
I responsed immediately and pressed volume down + power and it entered
http://www.jayceooi.com/wp-content/uploads/2013/02/Nexus-4-Fastboot-Mode.jpg
And then connected the charger and pressed power button again to select START
It booted and started charging
Mashed_Potatoes said:
I've had the Red light of dead yesterday because i had critical battery level and didnt charge
I responsed immediately and pressed volume down + power and it entered
http://www.jayceooi.com/wp-content/uploads/2013/02/Nexus-4-Fastboot-Mode.jpg
And then connected the charger and pressed power button again to select START
It booted and started charging
Click to expand...
Click to collapse
I know this proccess, but it's not working for me!
I don't know any other fixes. New battery? :/

My phone will not turn on at all.

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Try holding power + volume down. The lights at the bottom should start flashing, I think mine flash 14 times and then I get a reboot. Maybe volume up instead but I think it's volume down.
Possibly your usb-c cord is bad. Try to charge it with another cord for a while and try what silverzero said. Hold volume down and power together for a min and see if you can get into recovery.

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When I connect the phone to my computer, again it vibrates at short intervals without being recognized by the computer. Finally, if I plug it in the charger, it also vibrates.
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So I have a rooted oneplus 6t that was doing quite well for a little while now but for some reason today it died when it was hooked up to a charger. When I unplugged it and plugged it back in it did its usual vibration to signify it was connected but then it showed a qualcomm crash error (died too quickly to see it fully but it was small so I at least saw some of what it said) now when I try to let it charge it doesnt vibrate and doesnt even turn on when I left it on charge for a good hour now and when i hold vol up +power,vol down + power,both vol +power,or just power for their respective seconds to get the phone to respond. Tried looking for a answer online but none are similar to what i am having atm. Also my computer wont even see it either while it's like this. I've tried other cords as well to see if it was a cord issue and wasnt it's been sitting on the charger since 10:55 am est. Help?
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Volume Down + Power while turn on will boot to recovery.
Holding Volume Up + Power should force the phone to turn off.
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