OK.....further to Sixies plea for help here
My PC keeps shutting down she went out and bought a new case/psu because the psu wouldn't fit in the old Compaq case.
After dilligently transferring everything over she powered up and.....nothing happened!!!
She called me and over the course of this evening we've stripped it down to the following.
We took the old power switch and LED block across to the new case and installed that.
On power up it indicated a PSU overload.
So we basically went step by step unplugging EVERYTHING.
In the end all we had was the switch the PSU and the motherboard. Still PSU overload!
Finally we swapped the original PSU back and it fired up.
She has a Deskpro EN Mini Tower and the manuals can be found here
Compaq Deskpro EN Desktop PC series - Manuals (guides, supplements, addendums, etc) - HP Business Support Center
She's bought this case/PSU combi
http://www.apextechusa.com/docfile/pc373.pdf
The only manual I can find for it is this
http://www.apextechusa.com/support/PCManual.pdf
I've written to the case manufacturer asking if they're aware of any problems but in the meantime I thought I'd appeal to the YD massive and see if anyone knows why this might be?
Do Compaq have a unique ATX connector or something?
If you know Sixies number and have a solution then please give her a call as she's without a PC at the moment. If not the post a message or PM me and I'll relay to her.
Thanks in advance.