Re: acer aspire 4520 not powering up

Please anybody administrators,technician,repair specialist help me in this.
Can anyone in this whole forum unable to help me out?
Please I request everybody to look into this & help me.

I have acer 4520 laptop suddenly turned off & not turning on at all. No led, no power up at all, completely dead. Only battery charing led woking also battery is charging ok. But laptop dont start at all.
I have checked Tps51120,it has 5v & 3.3v standby. Power button has 3v & on pressing power button I get 3.3v at RSMRST & S5-ON pin both. But cant proceed further as I dont know what to do next.
So please help me here. Is it fault of tps51116 or nvidia chip. How to find?


Link for datasheet [url]https://cdn.badcaps-static.com/pdfs/076c3cb5adeb5e77...

Re: Acer aspire 4937 strange problem

Please anybody help.I have dead acer aspire 4520. No turn on at all.

Re: acer 5920g

Hi I have an acer 4520 laptop no power no light nothing when pressed power button.
I started checking tps51120 which shows standby 5v & 3.3v , power button shows 3.3v & on pressing power button I get 3.3 volt at RSMRST & S5_ON pin of sio chip. Please guide me what to do next.

Link for datasheet.
[url]https://cdn.badcaps-static.com/pdfs/076c3cb5adeb5e777017a7b2e57477be.pdf[/url]Re: acer 5920g<br /> <br /> Hi I h...tps51120 which

Re: New Members - please post your introductions here

Hello everyone I am sabya from india. I am here to gain some knowledge about motherboard repairs. Knowledge of soldering,desoldering. More about electronic circuits; how they work ! Seriously knowledge seeker.

Re: Acer Aspire 4520 Power Problem

I have aspire 4520 laptop not powering up at all. I started checking from TPS51120 & found 5v & 3.3v are ok. Then checked SIO, on pressing power button it releases 3.3v from both RSMRST & S5_ON pins. Then I found fds8884 was short & replaced. Found power transistor short Q28 (2N7002E) was short & replaced it. But still no power. Please anybody help.