Asus P58W-LA motherboard

[emy12]

Hi all,


Here is a HP PC m7000/2gb Ram/Ati video card/Pentium D processor socket 775
This the Pc of a friend. Pc keeps turning off/on by itself for ever, he said.
I just got it to have a look. First I cleaned it up. Such dust I have never seen, only from other's pictures. Five years since purchased and never been cleaned.
I checked:
-video card (replaced with one I have) OK
-Removed all other cards - the same problem
- removed all Ram memory- a good working motrherboard should have some beeps, this one nothing.
- Attached my AX750 PSU - the same problem
- cleared CMOS , no help
- changed the Hdd, the same problem
The only thing I have not checked is the processor, I have not any to replace it.
This motherboard has a few aluminium capacitors, the others are KZG, I think are from 2005, no sure. I did not remove the mainboard to look closer.
The three capacitors beside CPU, are KZG. No sign of leakage. They look perfect.
I think one of the two are the problem; the motherboard or processor. I tend to believe, based on my previous experience with KZG caps, that is motherboard issue.

What could it be? The KZG capacitors?

Thanks

[retiredcaps]

Re: Asus P58W-LA motherboard

Pc keeps turning off/on by itself for ever, he said.

I have this exact same motherboard. Mine isn't working with no post, but that is another story.

I wonder if your reset pin is stuck or shorted? This would be pin in the same place where the power on/off pins are.

[PCBONEZ]

Re: Asus P58W-LA motherboard

KZG are a well known problem. They fail often and don't always bloat.

Pretty good chance that's the only problem. [Or at least the biggest.]

You should replace those before you spend a bunch of time on this.
They are probably at least part of the problem and if they are they will hide any other problems.
.

[mockingbird]

Re: Asus P58W-LA motherboard

I don't think I've ever seen the 8mm KZGs bloat, but I often see the 10mm KZGs bloated (Especially the 3300uF ones)... 8mm KZGs should be replaced on sight.

[PCBONEZ]

Re: Asus P58W-LA motherboard

I don't think I've ever seen the 8mm KZGs bloat,

I have. - In Vcore.
More often they die without bloating though.
.

[emy12]

Re: Asus P58W-LA motherboard

Back with the old problem.
My friend decided to go ahead to fix his PC, his laptop was down too for a week and wants to have the PC done too.
Before replacing the motherboard I changed the 5x KZG 1000 uF 16v with nichicon 1000uF 16v, but it does the same, when turn the pc, all fans start and after a few seconds it turns off.
The motherboard looks OK, no signs of burn… I am thinking what else could be, maybe the chipset Intel P965 burnt? I do not know.
The other capacitors on motherboard are:
6x polymer 820uF 2.5v
4x CFJ 1500uF 6.3v
5x Polymer 471uF 6.3v
11x KZG 820uF 6.3v
1x CFJ 470uF 16v
and a few KZG smaller...

I am thinking to replace the 6x polymer 820uf 2.5 are closed on the left side of processor.
This PC never been cleaned and run till failed, I think were high temps, there are some traces of burn underneath of the motherboard…. (the shape of the heat sink mounting metal plate at the back of motherboard)
What do you guys think, to go ahead to change some more capacitors or throw it away.
Thanks

[Uranium-235]

Re: Asus P58W-LA motherboard

the ones that are on the VERY left side of the CPU were replaced? They look like nichis in the picture, is this a picture of post replacement or pre replacement? Which nichicons did you replace them with?

also, I notice a nichicon next to the northbridge, This is a 775 board probably from 04-05 within the bad nichicon manufacturing time range

[emy12]

Re: Asus P58W-LA motherboard

Thank you for replay.
Yes, it is post replacement. I replaced the KZG 16v 1000uF 8mm with Nichicon HN 16v 1000uF 10X16mm, five of them on left side of the CPU.
The Nichicon HN(M) 16v 1000uF 10X16mm I bought them a year ago.

[Uranium-235]

Re: Asus P58W-LA motherboard

Thank you for replay.
Yes, it is post replacement. I replaced the KZG 16v 1000uF 8mm with Nichicon HN 16v 1000uF 10X16mm, five of them on left side of the CPU.
The Nichicon HN(M) 16v 1000uF 10X16mm I bought them a year ago.

what about this one? it looks like an original board nichicon. Remember any 01-05 HP and dell boards have a chance of bad nichicons

edit: nevermind, looking at the other picture I can see its a panasonic. But the 3 below are KGZ's and I think part of the northbridge VRM, you might want to consider replacing those

[emy12]

Re: Asus P58W-LA motherboard

, you might want to consider replacing those

I do not know which once you are talking about. Maybe some of the 11x KZG 820uF 6.3v
I have lots of Nichicon HM 1000uF 6.3v, can I use them to replace some of the KZG 820uF 6.3v?

....Those three you are talking about?:
1x 16v 100uF KMG
2x 16V 220uF Radial KMG

KMG = United Chemi-Con ?
I noticed that in spite of the same colour which is the same as KZG, there are smaller once as KMG...

[bibilit]

Re: Asus P58W-LA motherboard

Such dust I have never seen, only from other's pictures. Five years since purchased and never been cleaned.

I was just thinking, can this just be a problem related with the processor getting too hot, and a security shutting the computer down ? or a warped board ?

Can you just remove the heatsink and renew thermal paste ?

[emy12]

Re: Asus P58W-LA motherboard

I was just thinking, can this just be a problem related with the processor getting too hot, and a security shutting the computer down ? or a warped board ?

Can you just remove the heatsink and renew thermal paste ?

As I said, everything else is OK, hardware point of you.
I am saying this because now I replaced it with FOXCONN 45CMX, a fellow had a few of them new, sealed, never used.
I got it, installed Windows 7, and everything is fine now.

So the motherboard is the problem. I am still trying to fix it, to change a few more capacitors, if is not going to work, I will remove the capacitors I have replaced and throw it away.

FOXCONN 45CMX is not that strong built as the Asus P58W-LA, but as long as is working finem it is alright.

[Clutchbox]

Re: Asus P58W-LA motherboard

Have you tried to place a new 3V CR2032 BIOS-battery? I don't see that step in your startpost.
In my experience those battery's last 4-6 years. If the voltage is below 3.00 volts it's as good as empty (according to various Lithium CR2032 datasheet's).
Especially Asus-board's can show such strange behavior with an almost empty battery, sometimes the board looks just plain 'dead'. Or the normal/usual bios-settings-reset behavior as it is with other manufacturers.

[Momad]

Re: Asus P58W-LA motherboard

The Motherboard è P5BW-LA.
I get the same Motherboard with same problem, i found this capcitore is about to ploat. it's PCE15 value 820uf/6.3V
after eplace it, take a part the the heat sink, then will clean it & CPU, change the termal conductor. the Pc will Work fine.

[rkaski]

Re: Asus P58W-LA motherboard

Can anyone tell me what cap is in the first position (CE134) between the PCIEX16 and
PCI1 slot, mine is missing and I would like to replace it(same board P5BW-LA)