do you think it would be worth putting anoher mother board in? I have read a few reviews that say the motherboards aren't reliable any way. Thanks for your help
I would not say that motherboards are not reliable, depends on the brand and model. I have worked on old P4 systems that have run for 10 years and also some dual core systems that barely lasted 3 due to motherboard issues.
The only thing is that it "may" be the motherboard, but there is really no way to find out without replacing it. So you're a bit stuck there unless you have a spare around. Will need to spend money to find the issue.