PC wont boot after memtestx86

[Bensonsjf]

I was having problems with my pc crashing, BSOD and IRQ not less than or equal to and several STOP messages.

The thinking was it could well be a RAM problem so I created the memtestx86 ISO disk and left it running for a week, all tested ok no errors.

Unfortunately now my pc wont boot at all and freezes on the BIOS screen. I cant access the CMOS. Ive tried running the system as bare as possible but it still wont boot! HELP The MOBO is a Gigabyte G41M and the CPU is a E3300 2.5GHZ Intel.

I have tested the power supply and all appears fine. I have also tried, I have tried swapping memmory sticks 1 at a time etc.

I am now truly stuck HELP!

 

[sonexpc]

How you test the power supply...... power supply give power doesn't mean it work...you need to see did it give the right voltage on each rail.

Do you try reset BIOS?

 

[Bensonsjf]

I tested all outputs from the power supply and all the voltages were correct as stated in the manuals.

I also reset the CMOS as per the manual, How do you reset the BIOS ?