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POST Single Beep but no Windows

Last response: in Systems
March 31, 2012 8:11:54 AM

Hi everyone! Here's the thing, After I've cleaned up my computer this morning powered it on, then a single beep but doesn't go into Windows. I'm able to get into bios/uefi and it can detect all of my ram, cpu, odd and hdd. I've removed the gpu, powered it on again and the result was still the same. Then I removed the hdd and displayed something about that there is no boot device which is I think is pretty normal. I don't what the problem is, which you'll help me.

The specs are:
WD Caviar Blue 320gb
4gb x 2 G.Skill 1333mhz (without heatsinks)
Power Color HD 6770
Seasonic m12-ii 520w 80 plus bronze
March 31, 2012 10:02:47 AM

Cleaned up how?

After the single beep, only black screen? Or do you see the Windows logo?

Do you have anything bootable around? A Windows install DVD, a memtest CD, an Ubuntu live CD or something like that? You could try to boot into that just to see what happens.
a b B Homebuilt system
March 31, 2012 11:33:19 AM

a single beep occurs on normal successful boot up. what exactly do you mean by "doesn't go into windows"? what is on the screen?
March 31, 2012 11:56:38 AM

Just wiped out the dust from the inside of the case and fans.

It's all good now, I just forgot to plug the 6-pin pci-e connector from the psu to the graphics card. What happened exactly is, it does a single beep then shows the ASUS logo after that it seems to restart and does a single beep again. If I keep on pressing DEL I can access the bios and there it can detect all of my hardware. I'm thinking maybe its the pci-e connector that was left hanging that caused the problem.