aspire 5742 weird issue !

[highpulse]

i there , i got this aspire on the bench and have a abnormal situation.

PQ52 source is 19 v olts but drain is oscilation between 10 and 13 volts , alltough both gates are 19 volts .. lifted the leg of the gate of the pq52 and now machine turn on . but still having one problem

IF dc jack is connected to the board , and i insert the batter , batteyr start charging and machine turn on normally and led charging is showing that is charging and battery is currently charging .
IF dc is not attached , i insert the battery , then if i insert the dc jack with the battery allready inserted the machine start to blink the LED (turned on led) but on orange . and machine dont turn on .

im a bit stuck thinking is could be the ISL , but not the problem , something around dc detect maybe . any help will be welcome

[dellxps15]

Re: aspire 5742 weird issue !

i had a blinking orange led on an acer when of the 4 wire from dc to mainboard, one red wire was desoldered. give it a look with multimeter.

19volt on the 2 red dc jack wire on mainboard.

[highpulse]

Re: aspire 5742 weird issue !

well not the case ehere , this was a malfunction on the dc detect circuit , and it solved

[highpulse]

Re: aspire 5742 weird issue !

another one, this one blinks the ON led in orange once the battery is inserted, but wont turn on in any way, without batt also not turning on .
pq 52 is with a high gate of 19 volts . replaced pupu13 pu18 , all litle transistor on detect dc , also pu17 replaced as also the 2 fets on dc in and batt mosfet as well . still the same

[alas3376]

Re: aspire 5742 weird issue !

see the mosfet ic around battery connector

[erhanabdullah]

Re: aspire 5742 weird issue !

I saw thread now ..try super io..