GigaByte K8NSC-939

[algomez]

This is my brother's computer MB. The computer boots fine but then shuts down randomly and starts going into a rebooting cycle.

I found 5 bulging caps evident in the photo below.

I'm going to change those 5 caps and see if that fixes it.

I'll let you know.


Thanks

[mockingbird]

Re: GigaByte K8NSC-939

That's odd... When was this board manufactured? What's the datecode on those bulged Nichicon HM?

[c_hegge]

Re: GigaByte K8NSC-939

Don't just replace the 5 bulgers. Replace them all. The others are probably not far off failing, or may have already failed without visibly showing it. Also make sure to use good ultra-low ESR caps, not just any 1000uF caps. https://www.badcaps.net/store/produc...roducts_id=131 will be fine.

[algomez]

Re: GigaByte K8NSC-939

I take it this is the code: A0451

I looked for the manufacturer date but the font is so small I need a magnifying glass. I'd say it's about 5 to 6 yrs old though running a P4 I believe.

That's odd... When was this board manufactured? What's the datecode on those bulged Nichicon HM?

[algomez]

Re: GigaByte K8NSC-939

Yes, I know that's the way I'll go. I'm going to make a list of all the values etc..

I also have three shuttles in my garage with bad caps. I'll make a different post when I get to those. This site really opened my eyes on why comps go bad.


Thanks

Don't just replace the 5 bulgers. Replace them all. The others are probably not far off failing, or may have already failed without visibly showing it. Also make sure to use good ultra-low ESR caps, not just any 1000uF caps. https://www.badcaps.net/store/produc...roducts_id=131 will be fine.

[c_hegge]

Re: GigaByte K8NSC-939

A0451 is indeed the date code. That means year 2004, week 51, which means that they are defective. The problem wasn't fixed until the next year.

[mockingbird]

Re: GigaByte K8NSC-939

A0451 is indeed the date code. That means year 2004, week 51, which means that they are defective. The problem wasn't fixed until the next year.

It should have been fixed by 2004 week 51 but apparently it wasn't.

[c_hegge]

Re: GigaByte K8NSC-939

^
No, it was fixed during 2005. Some of the early 2005 caps may also be suspect.

[algomez]

Re: GigaByte K8NSC-939

A quick update, I replaced the 5 bulging caps (6.3v 1000uf HMs) with exact replacements and the MB has not shutdown once after staying on a full day. I know I should probably replace all the caps but I may just ride this out as I really want to get to my shuttles

I am going to do a fresh windows install as well and leave it at that for now.

Thanks-

[ChaosLegionnaire]

Re: GigaByte K8NSC-939

... running a P4 I believe.

the k8nsc939 is an amd athlon 64 socket 939 motherboard NOT pentium 4.

also, i'd like to point out that its a nvidia chipset mobo which *might* have solder balling problems on the chipset. not sure if nvidia nforce3 250gb chipsets are on the list of bad nvidia chipsets but if it is, then u might have repaired it now but it might eventually fail again down the road. just fyi~ lol

[c_hegge]

Re: GigaByte K8NSC-939

^
This board predates the problems. that only affected Socket AM2 boards.