IP35 9.0 Post Error

[pmd]

I've got an IP35 pro running a Q6600 and 4Gb of RAM. It was working fine and now it fires up for 5 seconds and then shuts down with a 9.0 post code. I also notce the northbridge power light is showing as red. I've reduced the ram to one slot, swapped them around, removed all components except GPU and HDD, swapped PSU (to one I know works), cleaned and reseated heatsink, disconnected all fans andonly using CPU fan and still no joy.

Have searched other posts for similar issue but didn't find a solution posted...


MB is less than 12 months old....

Thanks

[pmd]

P.s Have cleared CMOS, removed battery etc and still nothing...

[pmd]

P.S I have used the two PSUs on a spare MB and proc I have and both work fine...

[BUFF]

there isn't a nb power LED & the 3VSB LED is meant to be red ...

please post full specs. of all components used.

[pmd]

Ok, spec is:

- Abit IP35 Pro XE Intel P35 (Socket 775) PCI-Express DDR2 Motherboard
- Intel Core 2 Quad Pro Q6600 "Energy Efficient SLACR 95W Edition" 2.40GHz (1066FSB)
- OCZ 4GB (4x1GB) PC2-8500C5 1066MHz SLI-Ready Edition Dual Channel DDR2
- Asus GeForce 9800 GTX+ TOP "Dark Knight" 512MB GDDR3 HDTVDVI (PCI-Express)
- Arctic Cooling Freezer 7 Pro CPU Cooler (Socket LGA775)
- OCZ ModXStream Pro 600w Silent SLI Ready ATX2 Modular Power Supply

Have tried different GPU also. Both PSUs I've tried work fine on another system...pretty sure it's an RMA job..?