This time it took 5 days for the error state to reappear and now it's not reverting back again.
The voltage across VCC-GND (pin 8-4) on the Winbond 25Q64FVIQ SPI Flash when the computer is powered on is 3.27V with 2.1mV ripple.
It's the same both in the error state and in the functional state.
The datasheet says that -0.6 to 4.6V is the maximum rating for VCC.
The voltage relative to GND doesn't exceed the maximum rating of -0.6 to VCC+0.4V on any of the other pins either.
I forgot to clarify about point 3 in the previous message; with the battery unplugged the voltage incoming from the power-adapter is still 5V, which again isn't enough to run the computer so it refuses to power on if the battery has also run out.
Here is a picture of the top right corner of the main PCB where the power connector JP23 from the external adapter is located:
View attachment 90411
Here is a close up of those smaller chips to the left of the power connector:
View attachment 90412
The markings on them are:
PQ5:
"7411 GV511C"
PQ6:
"7752 GA6D2A"
PQ11:
"7405 BA6B12"
PQ13:
"7405 BA6B12"
I can't find any information about these chips, does anyone know what they are?
I'd like to look at the datasheets for them.
If they have something to do with communicating against the power-adapter, then maybe I can look at and set registers in them with the Bus Pirate to force commands to the adapter.
