Asus P5QPLAM- Mosfets faulty?

[liukuohao]

Hi All,

I am not sure if there is any problem with capcitors on the motherboard.
The motherboard has got some TK capacitors (Toshin Kogyo)
6.3V 820uf (Taiwanese made capcitors) electrolytic type.
The total is 17 pcs.

VRM of the motherboard are using metal capacitors, but I cannot
identify the manufacturer. Total is 7 pcs.

There is no bulging found on the capacitors.

But I bit worry about the mosfets.
To me, it does not look like in good condition.
I cannot tell why there is a yellow colouring appeared on the affected mosfets.

The symptom of this motherboard is when viewing live video streaming
the video display on the monitor is slow.

Since I discovered the problem, I replaced it with another motherboard- Asus
P5KPLAM- everything works just fine. That is using the same VGA, CPU, RAM,
HARD DISK, PSU. So in other words, after changing the motherboard from
P5QPLAM to P5KPLAM, the symptom, never came back.

I am suspecting the likely cause of the problem is the mosfets.
Should I replace the mosfets? (I know it is not worth fixing it, but I am doing it
for purpose of learning how to fix it)

If replacing them, where do I get the mosfets from? eBay?
How to get the correct mosfets?

Most appreciate if someone can give an advice.

Please see the picture attached.

Thank you.

[Th3_uN1Qu3]

Re: Asus P5QPLAM- Mosfets faulty?

I would guess the board is fine physically and it is a software problem. I would try a BIOS update before anything else.

[liukuohao]

Re: Asus P5QPLAM- Mosfets faulty?

I would guess the board is fine physically and it is a software problem. I would try a BIOS update before anything else.

No, the BIOS is NOT the cause of the problem.

It is something to with the video circuitry.

I tried on its on aboard video, after running on POST and into OS, the screen
on my monitor is just showing multiples of lines, gibberish characters showing
up!

[Th3_uN1Qu3]

Re: Asus P5QPLAM- Mosfets faulty?

Ok that's something different. Either bad RAM, or if you sure the RAM is ok, then the Northbridge chipset with integrated video has partially separated from the board and requires reflow or reballing.

Most certainly, this has nothing to do with the mosfets.

[liukuohao]

Re: Asus P5QPLAM- Mosfets faulty?

Ok that's something different. Either bad RAM, or if you sure the RAM is ok, then the Northbridge chipset with integrated video has partially separated from the board and requires reflow or reballing.

Most certainly, this has nothing to do with the mosfets.

Reflowing? how on earth am I going to do that on my own.
I believe you need a machine to do this right?
So, I guess, that is the end of life for my Asus P5QPLAM motherboard, right?
Then, I can dispose it for good.....

However, I need to pull out the 1 of the pins of the socket 775.
And reuse it on another motherboard which has 1 pin broken.