New built PC won't POST or beep.

punky · 21-08-2006, 20:13

Help!

I've tried to build my PC (Pentium D 805, Gigabyte Intel 945P board etc) and it won't POST or beep.

I put in the processor, heatsink, memory, graphics and did the case connections (power switch, etc). Turned it on, and the heatsink whirled and remained to whirl, but nothing happened. display can't detect a signal and I can't hear any beeps. I changed the PC speaker in case it was that, but it still won't beep.

I then removed the graphics, and memory to see if that will make it beep. It didn't. Took off the heatsink and process, and it still won't beep or POST.

Is the motherboard knackered? I don't think its shorting as the heatsink remains on, but i'm going to try it out the case anyway, just in case

What does everyone reckon?

altis · 21-08-2006, 20:19

Well, it's got to be the mobo or the CPU. Swap one.

punky · 21-08-2006, 20:24

Yeah I think that too Altis

Tried it out the case and it still didn't work.

I've tried it without the processor, and it still doesn't post or beep, so its got to be the motherboard hasn't it?

I am sure i've got the PC speaker installed right. Any other suggestions for diagnostics?

21-08-2006, 20:53

forgive me, I know you will have checked it, but just in case - have you checked the 'clear cmos' jumper is not installed??????? sorry ...

punky · 21-08-2006, 20:56

Quote:

Originally Posted by homealone

forgive me, I know you will have checked it, but just in case - have you checked the 'clear cmos' jumper is not installed??????? sorry ...

Nothing to forgive mate, i'm greatful for anything.

The clear cmos jumper is open.... But I did try shorting it to see if that would help... It didn't

Paddy1 · 21-08-2006, 21:00

Take the battery out then short it and leave it for a few minutes. Then reverse, remove short and re-insert the battery.

If you leave the battery in while shorting the cmos clear jumper then the battery can give enough of a trickle charge to that the cmos doesn't clear properly.

Leave the machine plugged into the wall but with the socket switched off. This means the machine will still be earthed.

Edit:

You could also try removing the motherboard from the case and setting it on that spongy pad that you didn't throw away

.
The motherboard could be shorting on the case.

21-08-2006, 21:36

You did put the 12 v 4 pin power lead in didnt you? and are you using a 24 pin atx psu?

Strzelecki · 21-08-2006, 21:38

Quote:

Originally Posted by punky

Help!

I've tried to build my PC (Pentium D 805, Gigabyte Intel 945P board etc) and it won't POST or beep.

I put in the processor, heatsink, memory, graphics and did the case connections (power switch, etc).

What about the PSU?

No seriously, the extra 12V connecter is connect alright isn't it? An is it a 20 or 24 pin ATX connector (not sure which board)? Take out the motherboard and check the motherboard tray for an extra mounting or something you may have screwed in that could be shorting things.

Edit: What Zingle said then!

21-08-2006, 21:48

looking at the manual suggests that this mobo will work with 20 or 24 pin ATX connectors, but I'm not sure if a 'blanking' connector is necessary in the 4 pin socket, if a 20 pin one is used???

21-08-2006, 22:13

Quote:

Originally Posted by punky

Yeah I think that too Altis

Tried it out the case and it still didn't work.

I've tried it without the processor, and it still doesn't post or beep, so its got to be the motherboard hasn't it?

I am sure i've got the PC speaker installed right. Any other suggestions for diagnostics?

Its fooked then, send the Motherboard back.

21-08-2006, 22:19

Quote:

Originally Posted by homealone

looking at the manual suggests that this mobo will work with 20 or 24 pin ATX connectors, but I'm not sure if a 'blanking' connector is necessary in the 4 pin socket, if a 20 pin one is used???

its not its just a piece of plastic lol

21-08-2006, 22:29

Quote:

Originally Posted by zinglebarb

Quote:

Originally Posted by homealone

looking at the manual suggests that this mobo will work with 20 or 24 pin ATX connectors, but I'm not sure if a 'blanking' connector is necessary in the 4 pin socket, if a 20 pin one is used???

its not its just a piece of plastic lol

thanks, don't worry I'll be in touch if I want to get anywhere near this spec, - to quote Frank Zappa "I know when I'm licked - all over"

21-08-2006, 22:32

oh dear not another zappa fan least you didnt quote from "shes a teenage prostitute"

punky · 21-08-2006, 22:34

Thanx for the help guys.

I did plug the 20 pin atx in, and the 4 pin power. The graphics card powered up, that means the 4 pin power plug was plugged in correctly? Both were plugged in until they clicked.

I tried installing the motherboard outside the case, that didn't work

21-08-2006, 22:38

Quote:

Originally Posted by zinglebarb

oh dear not another zappa fan least you didnt quote from "shes a teenage prostitute"

Live at the Filmore 1971

/wonders if Shaun has made it to Seattle, yet, especially the Edgewater Inn, with the mudshark