Asus M2n4-sli

[c_hegge]

I recently aquired this motherboard from work. According to the customer, it would post sometimes but not others times (although I couldn't get it to post at all at work). Caps are as follows

4x 1000uF 16v Chemi-Con KZG
9x 1500uF 6.3v KZG
1x 470uF 16V KZG
2x 1800uF 6.3v Panny FJ
25x 6.3v 820uF FJ

Obviously, the KZG need replacing. I have Panny FJ for the 1500uF 6.3v, FL for the 1000uF 16v and Sanyo WG for the 470uF 16V.

Let me know if any of the replacements aren't suitable.

[c_hegge]

Re: Asus M2n4-sli

Done the re-cap. and it seems to POST reliably now, although it takes ~30 seconds for the first power-up since the 5vsb was removed. I'm currently installing windows on it. I'll let you know how it goes with the Prime95 stress test.

[c_hegge]

Re: Asus M2n4-sli

Looks like it is fixed. it ran for more than 48hrs in prime95.

[POM_MJ]

Re: Asus M2n4-sli

I've got an identical M2N4-SLI board from my friend.
it can not POST (BIOS beep not find any display adapter, beepppppp....beep.beep.)
most of caps on my board are Chemicon KZG.
All of them has no sign of bloat or any damaged.

Could it possibly back to live, if I recaps all KZG to Panasonic.FJ?

Pics will post later

[c_hegge]

Re: Asus M2n4-sli

Yes. KZG can die without bloating

[POM_MJ]

Re: Asus M2n4-sli

This one is mine, full of KZG. too many 820/6.3V caps



Where should I start to recaps for symptom cannot detected display adaptor?

[c_hegge]

Re: Asus M2n4-sli

Start with CPU VRM (All the caps on my second pic at the start of the thread). If that doesn't help, then replace the others.

[POM_MJ]

Re: Asus M2n4-sli

OK, I will start from there, thanks.

[mockingbird]

Re: Asus M2n4-sli

The new Asus boards use all polymers for the VRM and KZG for the rest of the motherboard.

Funny, last week I had problems with a P5KPL-CM that had all pannies. It would crash in 3Dmark2001 and would POST only intermittently. And the interesting thing was, the board was all Pannies. Either they were fake, or the board had some kind of design flaw.

[stj]

Re: Asus M2n4-sli

or they died from a log overheated life.
they are only rated for 2000 hours at 105' remember.

[370forlife]

Re: Asus M2n4-sli

or they died from a log overheated life.
they are only rated for 2000 hours at 105' remember.

But thats also at the maximum ripple current and voltage among other things.

I think rubycon the company says that for (their caps at least) for every 10C drop in temp the cap life doubles.

[POM_MJ]

Re: Asus M2n4-sli

I've done recaps around CPU socket.

4x1000/16V.Chemicon.KZG -> 4x1500/16V.Panasonic.FL (ATX12V ?)
6x1500/6.3V.Chemicon.KZG -> 6x1800/6.3V.Panasonic.FL (Vcore ?)
3x1500/6.3V.Chemicon.KZG -> 3x1800/6.3V.Panasonic.FL (near IDE connectors)
1x470/16V.Chemicon.KZG -> 2x470/16V.Samxon.GK (near PCIe slots.)

I have no AM2 processor now , I will get one tomorrow.

Any suggestions welcome?

[POM_MJ]

Re: Asus M2n4-sli

Yeh!, Its work!.

I will test it's stability next time after find a better chipset heatsink.

Thankyou Badcaps.net

[c_hegge]

Re: Asus M2n4-sli

Remember, the other KZG caps could fail in the future, so look at obtaining some replacements for them too.

[stj]

Re: Asus M2n4-sli

you shouldnt test pcb's on antistatic foam - the pink or gray stuff!

[POM_MJ]

Re: Asus M2n4-sli

Remember, the other KZG caps could fail in the future, so look at obtaining some replacements for them too.

Yes, its not stable! while KSG. are still there.
I've recaps some of KZG.820/6.3V to FJS.820/6.3V around DRAM area and PCIe slots, run better stable.
I decide to replace all of KZG.820/6.3V, but... too many.

you shouldnt test pcb's on antistatic foam - the pink or gray stuff!

please explain, why?

[c_hegge]

Re: Asus M2n4-sli

It's supposedly conductive, although I have done it before and not had problems.

[stj]

Re: Asus M2n4-sli

i saw a guy power one up sitting on one of the silvered bag's once and it arced & blew the board!

[stj]

Re: Asus M2n4-sli

btw, stop changing the chipset heatsink!

get a really tall sink that dont need a fan - it's more reliable.
the tiny fans die, they have been the cause of several dead motherboards here.

[POM_MJ]

Re: Asus M2n4-sli

It's supposedly conductive, although I have done it before and not had problems.

i saw a guy power one up sitting on one of the silvered bag's once and it arced & blew the board!

wow, I will more careful with these.

btw, stop changing the chipset heatsink!

get a really tall sink that dont need a fan - it's more reliable.
the tiny fans die, they have been the cause of several dead motherboards here.

my friend cannot find the original heatsink.
the gold tall sink in the pics that's CM blue ice, I've moved its fan to NF4-D.
I will find a big tall one with fan included for safe.

thanks for suggestions.