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Windows 7: PC Getting No Power At All

23 Feb 2011   #1
Win7User512

Windows 7 x64 / Same
 
 
PC Getting No Power At All

Hey everyone.

I built my box last summer and everything has been running fine since then. I don't leave it running extended periods when I'm not using it.

I was using Remote Desktop (MS's) to remote to it from my laptop last night (it is in another room and has a USB wireless adapter).

After about 30-45 mins, the RDC connection was lost and I had to manually reboot the PC in order to re-connect.

After the second time it lost the connection, I looked at the USB adapter and the "busy" light was off, so it had stopped working.

I tried plugging it in, in the other back USB ports but to no success, the light remained out.

Then I tried a front USB port. That didn't work. So I did a restart.

However, the machine powered off and has yet to come back on.

There is no sign of life. The mobo doesn't have any lights lit. Manually pressing the power button on the inside (on the mobo) didn't do anything.

I'm wondering if the front USB port shorted my mobo (or PSU) or if the PSU itself died (without affecting the MB).

I'll get a new PSU and try. Then I'll look at perhaps the MB was fried. I REALLY hope the CPU is unharmed.

The PSU itself doesn't light up (has an internal red light) anymore or spin.

Anyone have ideas or advice before I shell out another $500 for PSU and Mobo?

(My specs are below)


My System SpecsSystem Spec
.
23 Feb 2011   #2
Ciara

Windows 7 Professional 64-bit SP1
 
 

Hi Win7User512 , Have you checked the fuse in the mains plug as there is no sign of power to your PSU ?, if you use a surge protector that may need checking as well.
My System SpecsSystem Spec
23 Feb 2011   #3
Win7User512

Windows 7 x64 / Same
 
 

Quote   Quote: Originally Posted by Ciara View Post
Hi Win7User512 , Have you checked the fuse in the mains plug as there is no sign of power to your PSU ?, if you use a surge protector that may need checking as well.
What fuse are you talking about? I did try another PC power cord that should be working (I used it on another PC).

I have to check the surge protector (it is lit, but I'll make sure stuff is powered by it).

I reseated the battery.

Later, I'll take the PSU out and try to power it disconnected from the MB.
My System SpecsSystem Spec
.

23 Feb 2011   #4
SledgeDG

Windows 7 Ultimate x86
 
 

You can't just power on a disconnected PSU! In order for that to work 2 pins need to be shorted. But if you plug in the PSU and not even the fan starts spinning it either gets no power from the outlet at all or the fuse is blown or the PSU is fried. Since the capacitors inside the PSU still hold dangerous charges after unplugging I don't recommend to check for/replace a possibly blown fuse yourself. That's something to be left for a trained tech !!

-DG
My System SpecsSystem Spec
23 Feb 2011   #5
Win7User512

Windows 7 x64 / Same
 
 

Quote   Quote: Originally Posted by SledgeDG View Post
You can't just power on a disconnected PSU! In order for that to work 2 pins need to be shorted. But if you plug in the PSU and not even the fan starts spinning it either gets no power from the outlet at all or the fuse is blown or the PSU is fried. Since the capacitors inside the PSU still hold dangerous charges after unplugging I don't recommend to check for/replace a possibly blown fuse yourself. That's something to be left for a trained tech !!

-DG
If the PSU went bad/died. Do you think it would kill the mobo?

I'd much rather just have to replace the PSU than the board.
My System SpecsSystem Spec
23 Feb 2011   #6
Ciara

Windows 7 Professional 64-bit SP1
 
 

The fuse in the 3 pin plug that goes in the wall socket (I did say >
Quote:
the fuse in the mains plug
My System SpecsSystem Spec
23 Feb 2011   #7
SledgeDG

Windows 7 Ultimate x86
 
 

it depends on how much damaging current got into the board before the fuse blew. There is no way I could say that from here but if you see damaged caps on the board it's safe to order that too
PC Getting No Power At All-ibm_mobo_capacitors.jpgPC Getting No Power At All-gx270_capacitors.jpg

If you're lucky your board and CPU are still ok.

@Ciara: That you did only I was talking about the fuse inside the PSU
PC Getting No Power At All-r00320010725vgl01_01.jpgPC Getting No Power At All-r00320010725vgl01_02.jpg


-DG


My System SpecsSystem Spec
23 Feb 2011   #8
bobkn

Windows 7 Pro X64 SP1
 
 

Quote   Quote: Originally Posted by Ciara View Post
The fuse in the 3 pin plug that goes in the wall socket (I did say >
Quote:
the fuse in the mains plug
Not common in the USA.
My System SpecsSystem Spec
24 Feb 2011   #9
Britjoe

Window pro 8 64bit
 
 

We have three pins here but they have no fuse, the British plug your showing us Ciara is ALIEN this side of the pond, also in the UK they use 240 for everything and here we use 110
My System SpecsSystem Spec
25 Feb 2011   #10
Win7User512

Windows 7 x64 / Same
 
 

Well I will be ordering a new PSU tomorrow so I can try powering up again.

I tried the "paperclip test" for testing the PSU and it showed no signs of life.

Hopefully my problem will only be the PSU.



Quote   Quote: Originally Posted by SledgeDG View Post
it depends on how much damaging current got into the board before the fuse blew. There is no way I could say that from here but if you see damaged caps on the board it's safe to order that too
Attachment 140047Attachment 140049

If you're lucky your board and CPU are still ok.

@Ciara: That you did only I was talking about the fuse inside the PSU
Attachment 140051Attachment 140052


-DG
I looked over all the capacitors and NONE looked damaged, so hopefully the board and chip are OK.
My System SpecsSystem Spec
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 PC Getting No Power At All




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