dead mobo or cpu?

[jimjones]

Hi,

I have a pc here which doesn't boot anymore (just a black screen - nothing else).
Am i right to think this signifies a dead mobo (otherwise i would get beeps signalling a dead processor)?

Only marks on the mobo are:
in between pcislots : sy-6ba+ III
chipset near processor says soyo
so did the other (was a sticker - nothing underneath when i pulled it off)
some chips marked ite...

It is a pentium 3 mobo.

thx

[KURIAKI]

Soyo SY-6BA+ III
Manual:
http://www.soyo.com.tw/dl/manuals/686/m6bap312.PDF
Quick guide:
http://www.soyousa.com/dl/manuals/quick-sg/q6bap316.PDF

[jimjones]

Thanks for the manual

I tried and cleared the cmos but still nothing.

So, mobo dead? (i might get another if maybe the cpu still works)

[KachiWachi]

Power Supply OK?

[jimjones]

think so, yes - there's a led on the mobo that comes on and when i boot up the cpu fan starts spinning
(only way to power down is to keep the button pressed for +- 5 sec)

i'm gonna try another power supply anyways later

[jimjones]

same with other psu

just got some hope to find out if it's the processor or the mobo without a processor swap because ami actually has a beep code for 'bad processor'

however, if the cpu is dead i don't think the mobo will produce any beeps anymore

oh, i also checked the caps and 2 are bulging - i will not start soldering though unless i know at least the processor works

and there is still only one way to find out, i guess - try another cpu/mobo

[NickS]

Have you tried the following?
- disconnecting everything (disks, add-in cards, including video)
- taking the board from the case to eliminate a screw jammed under the mobo, shorting to chassis
- removing memory to force a "no memory" beep

[jimjones]

ok, i tried that too - no go

P3 processor works fine in a friends pc

I guess this is another mobo down to bad caps

[jimjones]

i replaced the 2 bulging caps on the mobo today, and guess what?

It is back alive!!

really makes my day ...