1 long, 2 short beeps: Display adapter problem (MDA, CGA)The beeps are post during post the very first work is done by the RAM , all the memory in the RAM is first transferred to the hard disk, and remains active until turned off.
WARNING: Before you start troubleshooting remember that you are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php - rules
Make sure that your RAM modules and Cmos battery are securely seated
on some motherboards Cmos batteries are soldered in.
Test all power and data leads that attach from Motherboard to your Hard Drive SATA
Make sure they have a secure dust free connections.
Check the graphics card is seated properly with no dust in the socket you might have to remove it to check for dust reinstall it.
Restart your computer the found new hardware wizard should activate.Hope this helps.
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