No Boot/Lack of Power

November 18, 2009 at 10:36:40
Specs: Windows XP Pro, 2GB
ATX machine fails to boot (i.e. nothing
happens, no bios, no screen activity), except
green mbd light on and CPU fan spins, along
with all case fans.

DVD drive won't open, no power lights on
case. PSU appears to have fan movement, but
difficult to tell.

PSU? MDB? No multi-meter to hand, and no
spare machine capable of testing PSU in. Any

CPU: Intel Pentium D CPU 830 3.00GHz
GPU: NVidia GeForce (not sure of the model)
PSU: Akasa 460W (AK-P460FG)
HD: Couple of 350GB SATA
DVD Burner and DVD-Reader/CD-Burner

Any suggestions, greatly appreciated.


See More: No Boot/Lack of Power

Report •

November 18, 2009 at 11:43:19
try to boot without RAM --- do you hear any beeps ?

Report •

November 18, 2009 at 12:06:24
No beeps without the RAM.

Report •

November 18, 2009 at 12:14:12
I'm popping out for a bit, check messages in an hour or so.

I realise that without a multi-meter I'm clutching at straws.

As soon as I get my hands on a meter, which won't be for a
couple of days sadly, I'll take some readings and report my
findings. Hopefully someone on the forum will be able to point
me and a meter in the right direction.

Also, assuming the meter readings for the PSU look good,
perhaps someone can help me with the examination of the
motherboard and what to look for.

All the best, and thanks in advance for any help,

Report •

Related Solutions

November 18, 2009 at 12:19:44
hmm...seems to be the CPU, since the computer can not beep without working CPU, even if it needs to do so...

Report •

November 18, 2009 at 12:25:47
I understand from my reading other posts that I must first rule
out the PSU, with a meter. That I must do this whilst the
PSU is still connected, because doing it stand-alone is not an
indicator that it's working.

Once the PSU checks out I then need to examine the
motherboard around the CPU.

If anybody on here can find a good site for showing me how to
test the PSU (still connected) with a multi-meter, that would
be most helpful. I can find stand-alone tests for a PSU, but
nothing whilst it's connected, even though various posters
have said a connected test is the best way.

Any thoughts?


Report •

November 18, 2009 at 12:32:15
I do not agree...if it was the PSU, the BIOS has own beep code about`s "Continuous short beeps"...

Report •

November 18, 2009 at 13:59:22
Sounds more like you have a short. Screw lodged under the mb, card not seated properly, etc. Strip and reassemble

Report •

November 18, 2009 at 14:22:33
I'm not sure where a screw would have come from, it's never
moved, or opened and has been working for years.

"Card not seated"... can it become unseated if it isn't moved? It appears to be in rock solid.

So you're saying don't test the PSU, and strip/build instead?
Most of the other responses I've seen appear to be suggesting
meter testing in the first instance for this exact same fault?!?


Report •

November 18, 2009 at 14:40:04
"I do not agree...if it was the PSU, the BIOS has own beep
code about`s "Continuous short beeps"..."

But what if the PSU isn't supplying adequate power to the
BIOS, then surely no beeps would occur regardless?!?

I understand that PSU's have to supply various currents and
sometimes these can be enough for one facet of the system,
but still not enough for the motherboard to go ahead with a

Anyway, I will of course re-build if I can't find another way to
deal with it.

Report •

November 18, 2009 at 21:15:08
Power supply pinout:

Report •

November 18, 2009 at 22:07:53
I have expirienced the same, almost exact problem. Psu fan turning, mb led on, case fans spinning but no boot. Problem was PSU. I still have the unit and have had it checked both with a multimeter and a psu tester. When a psu goes it doesn't always go completely dead. The only part of mine that does not work is power to the mb. No power there no beep. My system doesn't beep anyway but that's another story. Odds are it's the psu. I have seen this caused by the mb also not yet seen it from the cpu.


I want to go like my grandfather did. Peacefully in his sleep. Not screaming at the top of my lungs like the passengers in his car.


Report •

Ask Question