Hi
I have an acer aspire E5-575 laptop the is not responding to power button at all.
I have changed the KBC with new one but still same.
+3VPCU, +5VPCU... are present.. no short or hot component on board.
S5_ON signal is missing. which according to the schematics should come as soon as the power button is pressed.
I have programmed the bios …. no change
I have programmed the KBC … no change.
one thing I noticed recently is that when I remove the bios chip and connect the board to power supply, I get the S5_ON signal but also the board is not powering up and there is no power consume on the power supply.
I replaced the bios chip and reprogrammed it but no luck
I have replaced the TPS51225 that generates +3VPCU, +5VPCU but no luck.
I have replace the charging chip … because I noticed that the motherboard I identify the battery but is not charging it. however it seems that the battery was faulty.
I really get annoyed. this is the most difficult problem to identify I ever used to work on. and I will appreciate any advice.
this is its schematics.
I have an acer aspire E5-575 laptop the is not responding to power button at all.
I have changed the KBC with new one but still same.
+3VPCU, +5VPCU... are present.. no short or hot component on board.
S5_ON signal is missing. which according to the schematics should come as soon as the power button is pressed.
I have programmed the bios …. no change
I have programmed the KBC … no change.
one thing I noticed recently is that when I remove the bios chip and connect the board to power supply, I get the S5_ON signal but also the board is not powering up and there is no power consume on the power supply.
I replaced the bios chip and reprogrammed it but no luck
I have replaced the TPS51225 that generates +3VPCU, +5VPCU but no luck.
I have replace the charging chip … because I noticed that the motherboard I identify the battery but is not charging it. however it seems that the battery was faulty.
I really get annoyed. this is the most difficult problem to identify I ever used to work on. and I will appreciate any advice.
this is its schematics.
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