Asus KBN-E Not Posting / No Video

[tom66]

I got this motherboard from a friend.

Long story short he wanted a new computer, so I built it from spare parts. I didn't test the computer afterwards because I didn't have a monitor. It wouldn't POST or show any video when he got it. This was a few weeks ago.

I got the computer back and I notice two bulging L-Tec 820uF 6.3V caps (series unknown.) One is next to the northbridge and another next to the ATX power connector. The northbridge one has me worried - is this likely to be the cause of the no POST / no video?

However, that being said - the CPU VRM caps are fine (even thought they are L-tec - ugh) and there are three 1000uF 16V Rubycons next to the CPU caps, presumably filtering the 12V line… Honestly it would have been better the other way around, having the Rubycons next to the CPU... but I digress.

Is it worth repairing? I'm just going to give him another known working motherboard. Maybe keep this one as a spare but it's ancient: still uses AGP and I don't know what processor is installed but it has no south bridge, which is odd, as I thought that was a feature of newer chipsets only. 6 SATA (4 supporting RAID) is nice, but probably unnecessary for me.

[mariushm]

Re: Asus KBN-E Not Posting / No Video

It's a nice motherboard, using a nForce 3 "chipset". Won't find new processors for it as it's socket 754 but the existing processors are good enough to watch youtube videos (SD) or browse the Internet.

So yes, I think it's worth a fix attempt, should only be a few dollars.

It's very likely the northbride will be very hot - I've had an Asus P5ND2-SLI (nForce 4) and I remember 55-65C on the heatsink was common.

[PCBONEZ]

Re: Asus KBN-E Not Posting / No Video

The ad blurbs say it supports "Cool ´n´ Quiet Technology".
It appears to be working...

I wouldn't order caps -just- for a project like that.
Set it aside and the next time you have to order caps get some for that too and give it a shot.
.

[tom66]

Re: Asus KBN-E Not Posting / No Video

The ad blurbs say it supports "Cool ´n´ Quiet Technology".
It appears to be working...

I wouldn't order caps -just- for a project like that.
Set it aside and the next time you have to order caps get some for that too and give it a shot.
.

Making an order for £40 worth of capacitors for many little things that have recently died . I am adding them onto the order and will post back if it works.

Plasma TV, power line adapter, LCD TV and a motherboard, ... what doesn't have bad caps any more!?

[tom66]

Re: Asus KBN-E Not Posting / No Video

Are these caps bad as well?

They aren't bulging at all. But, they have this slightly black stuff emanating from the vent. Only these four have it. The others are clean. The stuff seems to rub off easily.

First two pics show suspect caps. Third pic shows two caps which look normal. The suspect caps all filter memory. The others only filter USB 5V.

I would recap the entire board but I've only ever repaired a few capacitors. It's something I'm not that good at yet. Also, I have put the order in already and will only have a few more capacitors left after the two main bulged ones are fixed.

It looks kinda like dust as if the fan assembly has blown some into it, but it's much darker and browner than the other dust. And it seems to be coming out from the edges of the capacitor and seeping through the vent. The CPU VRM caps don't show this, which I would expect if it was just dust from the fan. So I don't know what to make of it...

[yyonline]

Re: Asus KBN-E Not Posting / No Video

It certainly looks like dust to me. Which direction do the fins of the CPU heatsink go? Maybe that could explain why the VRM caps aren't as dusty.

[Uranium-235]

Re: Asus KBN-E Not Posting / No Video

yeah dust

this is a K8N-E, not kbn-e

they have KZG's on the input VRM, try replacing those

[c_hegge]

Re: Asus KBN-E Not Posting / No Video

replace them anyway. LTEC are pure junk

[tom66]

Re: Asus KBN-E Not Posting / No Video

yeah dust

this is a K8N-E, not kbn-e

they have KZG's on the input VRM, try replacing those

Rubycon on the input VRM on this model. It might be K8N-E or KBN-E. I can't tell from the font.

[tom66]

Re: Asus KBN-E Not Posting / No Video

replace them anyway. LTEC are pure junk

As I said, I cannot afford to replace them all as I did not originally order enough capacitors to do the whole board.

[PCBONEZ]

Re: Asus KBN-E Not Posting / No Video

K8 = CPU & Socket.
N = nVidia chipset.
S = SIS chipset.
U = ULI chipset.
V = VIA chipset.

Asus never made a KB-anything.
Is all typos on the web because the font sucks.
.
http://www.asus.com/Motherboards/AllProducts/
.