7 Replies Latest reply: Feb 17, 2012 12:37 AM by chrisalamat RSS

Bad motherboard or processor?

chrisalamat Community Member
Currently Being Moderated

I'm no expert, but I'm pretty sure the cpu is bad. System build, almost all parts have previously been used.


I have a DP43BF motherboard, Intel Core 2 Duo e8400, EVGA GeForce 7900 GTX graphics card, new 8GB (2x4GB) DDR3 RAM, and a new 400W PSU.


After building, I turned it on for the first time and got three beeps in a row and it repeated. No boot or on-screen display, fan's turned on, hard drive churned, disk drives powered up, but the beeping continued.


I did some searching and found this discussion: http://www.tomshardware.com/forum/301206-28-build-stand-motherboard-blinking

So I followed the steps listed on it, I unplugged virtually everything from the board, leaving only the PSU (24 pin and 2x2 pin), case power button, and CPU connected to it, and the beeping still continued. I have an older Pentium D processor, so I decided to plug that in place of the e8400 just for the heck of it. I then powered it up again and then no beeping, I didn't have anything else plugged into it yet, but it sounded normal. After a several seconds it restarted itself, then stayed on for a while. I didn't want to lit on for to long because heatsink and fans were disconnected, but it seemed like it worked. I then plugged the Core 2 in, and again, there was beeping. I had to get to work so I had to stop testing after that, but that would indicate to me that the e8400 is bad? I'll try again when I get home with the Pentium D and a monitor attached, to see if I get anything. I know the e8400 is supported by the DP43BF motherboard so that shouldn't be an issue.


So are my findings correct? Are there any other tests I should try before I rule the e8400 the problem? Maybe the PSU is not enough, even thought I unplugged everything? Bad memory, even though it's brand new? Could I have messed up anything when putting it all together? Like I said, I'm no expert, I know about computers more than an average person, but I'm not a pro. Thanks for your help in advanced!

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