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Dell diagnostic lights 2, 3, &4

Last response: in Systems
August 3, 2010 3:43:54 AM

I have been given a dell dimension e520, can't get it to run. When I turn it on I get one beep but I can't get a display. I have reseated the RAM, removal results in constant beep. I've been booting up with just one stick of RAM, no drives or cards. Dell's diagnostic lights on the front of the PC indicate a problem. Lights 2, 3, & 4 stay on solid green, no flashing. According to dell this means "possible usb failure". Any ideas?

More about : dell diagnostic lights

September 13, 2010 12:34:19 AM

Very late, but take a jumper from a nearby pin and clear the CMOS on the mobo, you do this by plugging the jumper into the clear CMOS needles.
September 17, 2011 11:58:10 AM

motherboard went bad.


I'm having the same problem. Lights 2,3,4, but I've tried reseating all the USB's, nothing. My question to you is, why did you reply "motherboard went bad." Does this mean the board is dead?