The CPU fan, for the AMD 1800, is powered from the MOBO.
I've tried various combinations of the following to get this thing to
POST:
* single Corsair 512MB PC 3200 XMS stick in slot 1
* single 512MB PC 2700 (unknown brand) stick in slot 1
* jumper setting for FSB freq
* an Antec 350W PS
* an Antec 450W PS
* resetting the CMOS
* Rage 128 Pro AGP graphics card
* S3 Trio PCI graphics card
the only thing plugged in right now is the floppy drive and an AGP
Rage 128 Pro
I'm thinking about calling it quits on this one, unless someone has
some more words of wisdom to impart.
-Steve
According to this page, the Rage Pro 128 will work fine. It can run
at 4X and 1.5volts I/O.
http://mirror.ati.com/support/faq/agpchart.html
Are you able to get sound from the Voice POST ? Maybe the messages from
the Voice POST will give you a hint as to what is wrong. The Voice POST
is an independent subsystem on the motherboard, and AFAIK only needs a
working +5VSB for its functions. Even if the CPU and RAM are removed
from the board, the Voice POST will still do something.
You might also assemble motherboard, CPU, memory, video card and PS on
some cardboard, and see if you can get some life that way. Check that
the CPU heatsink is oriented correctly, that the CPU has some thermal
interface material on it, and that the CPU fan is connected to the
fan header. Some motherboards won't start if they don't think the CPU
is installed properly.
Also, with the board assembled on cardboard, you might be able to
flip the board on edge, and probe the underside of the ATX connector
while someone else holds the board stable for you. You can check the
voltages after the two power_on pins on the panel header are
momentarily shorted together, to see if any voltages are missing due
to a short somewhere.
You might also search around and see if someone has a PCI POST card.
This is a test card that plugs into a PCI slot - the BIOS will
write to the two seven segment displays on the card as the BIOS code
runs. This will indicate whether the CPU is actually running any code
or not.
(If this is a refurb, then you never know whether the previous user
had BIOS trouble. If the board is brand new, I wouldn't suspect BIOS
corruption as the root of the problem. You have to get into the BIOS
to mess it up
)
HTH,
Paul