Samsung Galaxy SM-A500FU freeze in recovery mode - Green fading screen/glitched - Galaxy A3, A5, A7, A8, A9 Q&A, Help & Troubleshoot

Hello
I have a rooted Galaxy A5 with stock Lollipop 5.0.2 installed. Lately I've been trying to figure out how to install the Xposed framework and Xprivacy. So I was reading something about having the bootloader unlocked before doing a TWRP recovery and I couldn't find a way to see if my phone has it unlocked or not.
I was then thinking that maybe I can find some info about this if I enter recovery mode (been a long time since I rooted and can't remeber much) and so I turned my phone off and held down volume up, home button and power button.
Samsung logo shows up and everything seems fine at first. The screen then goes black with bright green pixels and lines slowly fading in and the samsung logo again as well, slightý visible behind this green mess that now covers the screen. It then slowly fades back to black with a few grey lines visible and nothing happens. I panic and and hold down the same buttons again and fortunately it rebooted like normal.
I have never had a problem with this phone or the stock firmware that I'm using (before root it was swedish/scandinavian, now uk I believe.)
What's going on and what to do? Can frozen apps affect any of this?

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side button lights? are you sure you have an s5 g900x
vincom said:
side button lights? are you sure you have an s5 g900x
Click to expand...
Click to collapse
im betting he's referring to the capacitive buttons flanking the home button
Yeah I'm sure on the the phone is a G900F, I'm referring the side buttons. Any ideas? Can a ROM flash kill the screen totally?

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