Acer Aspire 1300 doesn't switch on at all

[mrfree]

I'm trying to repair an Acer Aspire 1300 series, when I press the power button nothing happens... no fan, any led, nothing.

I disassembled it and removed all removable devices: battery, hdd, floppy, cdrom, ram but nothing changes I also tried to remove cpu too, still no changes

The power supply output is ok, I checked the power button dipswitch on the mb and it works too... I'd like to test the standby power anywhere, it uses a Maxim 1632... any suggestion?

[mrfree]

Re: Acer Aspire 1300 doesn't switch on at all

Reading some useful threads on this forum I can add the mobo is probably a Quanta "T2A" rev E... I'm starting searching for the battery charger circuit on it

[mrfree]

Re: Acer Aspire 1300 doesn't switch on at all

checking the battery circuit I've found on the battery + line (without battery attached) I've 5,45v just after insert the power plug, that voltage lowering constantly to about 0,6v after few seconds... could it be normal?

[fddizon]

Re: Acer Aspire 1300 doesn't switch on at all

checking the battery circuit I've found on the battery + line (without battery attached) I've 5,45v just after insert the power plug, that voltage lowering constantly to about 0,6v after few seconds... could it be normal?

looks like the circuit is draining the power. check for any shorted mosfets, capacitors on board

[leopold1112]

Re: Acer Aspire 1300 doesn't switch on at all

To check tension on duty on MAX1632.