Case shorting out pc

Felix Da Housecat · 11 Nov 2010 at 11:00

Hi,

Been having problems with my Shuttle SN25P, about 2 weeks ago it stopped working for some reason, nothing had changed and it had not been touched/opened for a while so I decided to open it up and clean it out thinking it was over heating or something.

Once I'd put it back together and switched on the blue light on the power button would flash then go out and the green LED on the motherboard would go out.

I checked the cables and everything looks to be correct and there was no beeps coming from it either.

I suspect the problem is something is shorting out on the case as the pc works when I take everything out and set it up on my desk (I'm using the pc to write this) but when it's mounted in the case it fails to start up.

Ive had a look to see where it's touching but for the life of me I can't work out where. I purchased some of the motherboard washers to rule out any touching around the screws but it didn't help.

What would be the best thing to do now?

Beerbaron · 11 Nov 2010 at 11:04

other than mounting the mobo in the case what else are you doing differently. do you just sit it in the case or do you screw it in? do you screw in any other cards as well?

Felix Da Housecat · 11 Nov 2010 at 11:23

I've not done anything different, I've screwed the motherboard and GPU card in, and even taken them out thinking they were causing the board to touch the case.

d_brennen · 11 Nov 2010 at 11:25

Does the PC work when out of the case?

Boozebeard · 11 Nov 2010 at 11:35

d_brennen said:
Does the PC work when out of the case?

Wow, didn't read the op at all huh?

I suspect the problem is something is shorting out on the case as the pc works when I take everything out and set it up on my desk (I'm using the pc to write this) but when it's mounted in the case it fails to start up.

matthab · 11 Nov 2010 at 12:05

Personally, working from lots of shuttles. If you changed or done nothing its going to be a faulty PSU or Mainboard. Sadly Shuttle PSU's are noturious to get hold of.

That is of course you using a different PSU to the internal one when you bread board it?

Felix Da Housecat · 11 Nov 2010 at 12:15

Everything still works, PSU, motherboard, GPU, CPU, and memory. I've taken it all out of the case and it works fine.

I've tried to start it on with just Motherboard, CPU, memory and PSU in the case and it still fails to switch on, so it's nothing to do with GPU, or the casing of the unit.

Short of buying another barebones case and transporting my GPU, CPU, memory, and drives + new OS into it I dont know what to do.

d_brennen · 11 Nov 2010 at 12:21

Boozebeard said:
Wow, didn't read the op at all huh?

Wow, very constructive. I missed that bit because I'm reading on my phone, sorry!

Back on track - faulty power switch? Try jumping the pwr header with a screw driver while it's in the case?

Felix Da Housecat · 11 Nov 2010 at 12:33

d_brennen said:
Wow, very constructive. I missed that bit because I'm reading on my phone, sorry!

Back on track - faulty power switch? Try jumping the pwr header with a screw driver while it's in the case?

I've taken the front off the case so I'm still using the power switch as usual, so thing wrong there.

I'll upload some pics as it is now.

Felix Da Housecat · 11 Nov 2010 at 12:43

Only thing that is not being used is the case and optical drive

d_brennen · 11 Nov 2010 at 13:23

Does the solder on the back of the gpu touch the case? Looks fairly close. Aside from that are they brass stand offs all round or are some built into the case?

Felix Da Housecat · 11 Nov 2010 at 13:56

d_brennen said:
Does the solder on the back of the gpu touch the case? Looks fairly close. Aside from that are they brass stand offs all round or are some built into the case?

The GPU doesn't touch any part of the case or the motherboard, also the problem still happens when the GPU isn't installed.

d_brennen · 11 Nov 2010 at 22:15

Out of ideas, just had a thought though - USB headers? Do you have a card reader and front panel USBs plugged in? I've seen a shorted USB socket before

Other than that I can't help