My phone was plugged for charge with my usual cable. Battery was around 20%, with green LED. After a moment, I noticed that the LED turned red (while still on charge), so I tried to unlock my phone, but nothing happens.
I tried removing the battery and the screen and try again, but the problem is still the same : Black screen, no reaction to Power button (neither to power + vol up/down), and a red light if plugged in.
I tried waiting a long time (more than one hour), but the LED stays red (no yellow/green). I also tried a battery reset.
Any ideas of where the problem could come from ?