Prime does not turn on after charging

[olr]

(08-12-2019 04:58 PM)Jean-Baptiste Boric Wrote:  I advise you NOT to attempt removing the motherboard. It is glued pretty strongly to the back of the screen and there's nothing interesting back there for troubleshooting.

Assuming this is a G1, there should be a UART_TX pad on the motherboard. I haven't done this in a long time, but you can try connecting to it (3.3v TTL, 115200 bauds, 8 bits, no parity) and see if there's a boot log transmitted upon reset.

Ok, I will not touch the motherboard. It's a revision A (NW280AA). I'm not experienced with attaching to UART TX. Any hints, where i can find it on the board? I would need to find the hardware and time (and motivation) to start this experiment.

(08-13-2019 01:31 PM)ndzied1 Wrote:  I think there was an older firmware that would turn on with the screen completely dimmed. The calculator appeared off but was actually just dimmed to zero. Long shot but did you try to increase the screen brightness? Hold down the ON button and press the '+' key.

Just tried that, unforunately this didn't work either. I didn't use the Prime very often but when i heard about a new firmware i upgraded.

Thank you,
olr.