Booting up, no beep II

[oceanclub]

I posted this a while ago:

http://groups.google.com/group/alt....l_moloney+motherboard&rnum=3#15e196b63c52956c

As mentioned, I tried swapping for a new power supply, memory and CPU
with no luck.

Since then I bought a A7N8X Deluxe and installed it. When I switch on,
same problem. I get a light on the motherboard, the fans spin up, but
no beeps, and nothing on video. Also, despite being plugged into the
correct connection, the power LED on the case doesn't come on.

Any ideas? I'm at my final tether here.

P.

 

[Rob Hemmings]

I posted this a while ago:

http://groups.google.com/group/alt....l_moloney+motherboard&rnum=3#15e196b63c52956c

As mentioned, I tried swapping for a new power supply, memory and CPU
with no luck.

Since then I bought a A7N8X Deluxe and installed it. When I switch on,
same problem. I get a light on the motherboard, the fans spin up, but
no beeps, and nothing on video. Also, despite being plugged into the
correct connection, the power LED on the case doesn't come on.

Any ideas? I'm at my final tether here.

Looks like it must be either a dead VGA card, or the case power-on
switch is not making momentary contact when pressed. To test that,
unplug it from the mobo header and either use a small screwdriver
to quickly 'short' the two pins it came from, or unplug the reset switch
too and plug that into the power switch pins, then press the reset button
which should turn it on.
As it's now an A7N8X deluxe, you could plug a pair of powered
speakers into the lime-green line-out audio socket on the back.
The vocal POST reporter should tell you what the problem is.
If this gives no sound at all, remove the VGA card and reboot -
you should then hear the voice report a graphics card problem.
It may be worth reversing the power LED connection on the
same mobo header - you will cause no damage if it's the wrong
way around.
HTH

 

[oceanclub]

As it's now an A7N8X deluxe, you could plug a pair of powered

speakers into the lime-green line-out audio socket on the back.
The vocal POST reporter should tell you what the problem is.
If this gives no sound at all, remove the VGA card and reboot -
you should then hear the voice report a graphics card problem.

I've tried this (all PCI/graphics cards out, headphone in), still
nothing, no voice report. The only things connected up are:

* CPU and cooler
* memory

Still the same reactions - the CPU and case fans spin up, the
motherboard light comes on, but nothing else happens.

I'm going to try yet another power supply tomorrow. If that fails, I'm
totally stumped, since it's essentially a new PC compared to the old
one, yet has the exact same problem.


P.

 

[jb]

beginning to sound like the processor may be shot.. nothing can run without
the brain.....

coworkers being the exception
jb.

 

[Oldish sod]

I've tried this (all PCI/graphics cards out, headphone in), still
nothing, no voice report. The only things connected up are:

* CPU and cooler
* memory

Still the same reactions - the CPU and case fans spin up, the
motherboard light comes on, but nothing else happens.

I'm going to try yet another power supply tomorrow. If that fails, I'm
totally stumped, since it's essentially a new PC compared to the old
one, yet has the exact same problem.

It could be 'BIOS death', and a dodgy CPU may
well be involved, now jb mentions it (reason: far below).
The first A7N8X I had, worked once (1st boot.)
I entered the BIOS, had a look around, changed
nothing (ok, perhaps time/date) and chose to exit
the BIOS without saving changes (to be safe, so I
thought).. Nah, no, non - it never powered-up
again until the BIOS was replaced.(hot-flashed as it
happens, but..) Then I heard you should always
save & exit (saving changes) the 1st time you enter
the BIOS on this mobo, even if you don't change
anything.. That has been repeated so often that I
now don't know whether it's true or myth.
However, I found out later that the CPU (by
then in another system that seemingly worked fine),
an Athlon XP2000, had a faulty 2nd-level cache,
so none the bloody wiser..

 

[oceanclub]

I'm going to start at first principles - take the m/b out of the case,
and take out the CPU. So, just the m/b (leaving the link to the case's
power button), power supply (2 in turn) and headphones attached to the
audio out. In that case, if I don't get a "No CPU installed" vocal
post, I presume something _must_ be wrong with the m/b?

P.

 

[oceanclub]

Ok, stripped everything out of the case. With the following combo:

* new M/B
* original PSU

Nothing.
With:

* new M/B
* new power supply
* spare CPU

I'm finally getting vocal posts. Phew, it seems it was indeed my PSU
that was the original problem and that must have damaged my original
CPU. Thanks for your help,

P.