Asus P5B SE, no post, no beeps

Got a new PC custom-built from ComputerPlanet. Had to buy a video card as it didn't come with one though sort of implied it did (but that's another issue). After eventually getting it to work, via buying a new DVI cable as well, got into Vista and spent the rest of the afternoon setting things up, copying stuff from my old PC, etc. But at about 11pm I was in the middle of browsing, doing nothing particularly unusual when the PC decided to reboot - no nice shutdown, just a beep and restart. But that's as far as it got. Left it overnight, tried it again this morning. No beeps, no video. Tried various suggestions found via Googling:
- Removed RAM (should get one long, two short beeps - got nothing)
- Removed gfx card (no beeps)
- Removed keyboard, mouse, DVD drive, HD (no beeps)
- Checked all the motherboard connections (no beeps)
- Reset the CMOS following the instructions in the manual - remove power, remove battery, short pins 2-3 for 5~10secs, replace (no beeps)
- Tried Alt-F2 to get into BIOS update (no video (yes I replaced the gfx card), no beeps, so I don't think it went into that option).

Specs:
500 GB SATA HDD UDMA 300 7200 16MB
ASUS P5B SE S/L 1333FSB (O.C) (Intel G31)
Motherboard Integrated 3D Video
Intel Core 2 Duo E7200 (2 x 2.53 GHZ) 1066FSB - 3 MB
Corsair XMS2 4GB DDR2 PC-6400 800 MHZ (2 x 2 GB 800) - Lifetime Warranty
HIPER POWER 530W Low Noise/SLI Ready
Coolermaster Centurion 5
Samsung DVD +/-RW 18x6x18x8 D/LAYER Black (IDE)
Motherboard Integrated 5.1 Sound
Speeze QuadroFlow VIII - Low Noise
Microsoft Windows Vista Ultimate SP1 64-BIT (Genuine DVD & COA Included)
ASUS Wireless LAN 125Mbps PCI
Sapphire ATI Radeon X1650 PRO (512Mb DDR2, PCI-E x16)

I don't have any friends around here to try swapping components, and my old PC is too old to test anything with.

It's now Saturday and their tech support doesn't open until Monday. Anything else I've missed that I can try? Thanks

Geoff M.

Geoff,

I have the same problem with almost the same hardware profile. Were you able to resolve the issue?

19-10-2008 17:14 PC NOW WORKING OK. CUSTOMER REMOVED HDD SO WE CANNOT TEST. SENDING BACK
17-10-2008 14:43 PSU HAS NOW BEEN REPLACED
17-10-2008 14:35 REPLACING PSU
16-10-2008 17:52 DURING LEVEL 1 TESTING STAGE WE HAVE DETECTED A POST PROBLEM WITH YOUR MOTHERBOARD. THIS WILL BE PASSED TO A LEVEL 2 TECH TO DIAGONOSE.
14-10-2008 8:29 MOTHERBOARD HAS NOW BEEN REPLACED.
10-10-2008 10:52 DURING LEVEL 1 TESTING STAGE WE HAVE DETECTED A POST PROBLEM WITH YOUR MOTHERBOARD. THIS WILL BE PASSED TO A LEVEL 2 TECH TO DIAGONOSE.
10-10-2008 10:15 BIOS CPU IS NOW IN THE SYSTEM.
10-10-2008 9:22 THE MOTHERBOARD REQUIRES A BIOS FLASH TO MAKE THE CPU WORK CORRECTLY WITH THIS MOTHERBOARD. A LOWER END CPU WILL BE FITTED TO ALLOW THE BIOS TO BE FLASHED, THE OPIGINAL CPU WILL THEN BE PUT BACK IN.
10-10-2008 8:36 DURING LEVEL 1 TESTING STAGE WE HAVE DETECTED A POST PROBLEM WITH YOUR MOTHERBOARD. THIS WILL BE PASSED TO A LEVEL 2 TECH TO DIAGONOSE.
03-10-2008 7:19 THE MOTHERBOARD HAS NOW BEEN REPLACED IN THIS PC.
01-10-2008 18:27 REPLACING BOARD WITH ASUS P5KPL-AM
30-09-2008 15:33 DURING LEVEL 1 TESTING STAGE WE HAVE DETECTED A POST PROBLEM WITH YOUR MOTHERBOARD. THIS WILL BE PASSED TO A LEVEL 2 TECH TO DIAGONOSE.
22-09-2008 11:08 REPLACING SURGE PROTECTION, SLIGHT DINT IN SIDE OF PC WHEN ARRIVED BACK.