asus K52F short?

[anno]

i have a asus K52F laptop . user said it had wrong bios flashed or gone wrong.
I noticed high current draw in standby. visually i see nothing wrong on mainboard. i used lab power supply and noticed when i set to 3-4 volt current draw is 0.7A without battery and i touched the board and noticed PCH is getting hot. So is it possible PCH chip has a short and how can i be sure?

are there other tests i can do. I am note sure about the diagram i can`t find it for K52F, but found an Asus K42F , one person said it was the same. correct?

[bicalov]

Re: asus K52F short?

Maye this helps.

https://www.badcaps.net/forum/showth...highlight=k52f

[anno]

Re: asus K52F short?

hi still not solved the problem. The 5vus coil is 4k ohm to ground, but the 3.3vsus is 91 ohm to ground. is this normal? i think not?

[dj_ricoh]

Re: asus K52F short?

so!

my friend! diagrams !

then we hug

[rs232killer]

Re: asus K52F short?

lift bga then see what fires up

You will need to replace bga with new one

[atsio]

Re: asus K52F short?

91 ohm on 3.3vsus probably has nothing to do with bga. You have a short somewhere on the 3v rail.

[anno]

Re: asus K52F short?

ok. so 91 ohm to gnd on 3.3vsus is not normal. good to know. now i try to find the short. that is not easy isn't it ?

[dj_ricoh]

Re: asus K52F short?

depends !?!?!?

how many tools you wanna use

[anno]

Re: asus K52F short?

i have most tools.

when i give 3.3v with lab power supply, current is normal . so there is no short on the 3.3v line , i think. still has lot to learn.

[anno]

Re: asus K52F short?

i have schematic that are similair. where do i start. can anyone help me with this?

[atsio]

Re: asus K52F short?

i have most tools.

when i give 3.3v with lab power supply, current is normal . so there is no short on the 3.3v line , i think. still has lot to learn.

When you give 3.3v with lab power supply, it should not draw any current. Just check with a thermocouple what is getting hot.