FP2 does not start or charge, logo appears but then black screen again

This morning my phone was on very low battery, so I connected it to the cable, but it did not charge and after a while died of because of no battery.
I took out the battery, let it rest one hour, put it back in and connected to cable again. Now the charging light blinks red, and quite fast.
From time to time it vibrates and the Fairphone logo appears but then the screen turns black again.
After having it connected to the cable for a few hours it’s still the same but got a bit warm, so i disconnected it and don’t know what to try next.
I tried different cahgers and cables
Is anyone experiencing the same or has some advice?
Thanks, Sabine

A post was merged into an existing topic: FP2 Won’t turn on or charge - See first post for troubleshooting