acer 4752 no power!!!!

[ry x hunter]

hi guys.. i receive a unit acer aspire 4752 and it cant turn on so i decide first to test the charger and its ok.. i decide to check input voltage along dc and its ok but 1 thing bothering me.. i check the output on ic pu4103 and here is the value rt8223mgqw.. ill check the schematic and i found that no 5 volts output on pin 24.. i try to remove it and resoldered again ad power goes on but after i test on and off a several time problem came back its no power again..
i check all the pin output on that ic but i am not familiar for the voltage that came out. pls helpppp
here are the reading on the ic what ive got..


rt8223mgqw

pin 1-1v
2-2.3v
3-2.1v
4-2.1v
5-0v
6-1.2v
7-3.8v
8-3.8v
9-8.4v
10-3.9v
11-3.8v
12-0.4v
13-0.8v
14-3.8v
15-0v
16-19v
17-5.2v
18-3.5v
19-0.2v
20-5v
21-5v
22-9.9v
23-2.6v
24-5v

[ry x hunter]

Re: acer 4752 no power!!!!

problem fix after i reseat the parts on mainboard but always came back after several test..

[spleenharvester]

Re: acer 4752 no power!!!!

Try a BIOS flash. I had a similar problem on an Asus mainboard once where after reseating something or changing a BIOS setting the problem would go away.

But may be a bit risky if it's really that temperamental.

Another possibility is a BGA problem or a dry solder joint elsewhere, might be worth doing a mild reflow. Which parts are you reseating?

[sasser]

Re: acer 4752 no power!!!!

Anyone have diagram forAcer Aspire 4752 - 2332G50Mn? I touch fet the code number is brand nikos p1403ev and got really hot. Is that culprit on the fet?

[degutji]

Re: acer 4752 no power!!!!

Try this