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Old 08-07-10, 13:47
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superstar superstar is offline
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Arrow Dell Dimension 3000 [A20 Error On Boot]

My buddies computer is saying the following after boot:

previous attempts at booting this system have failed at checkpoint a20
We don't know what this means, and I've found no information on this. It won't even boot into windows...

Please help...


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Old 08-07-10, 13:53
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Default Re: Dell Dimension 3000 [A20 Error On Boot]


Try removing the motherboard battery (maybe even change it for new) to reset CMOS, then after say 10mins replace and reboot and try and enter the BIOS and check that date and time and boot sequence is ok.

While inside the PC, take out the ram and then plug it/them back in as one maybe loose, and check any other connectiosn HDDs, Video card etc
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