What are the letters on the back of the dell desktops?

On the back of my dell in green lights there are 4 letters. The letters A, B, C, D. All 4 of them are green. I just want to know what they mean or what they are forWhat are the letters on the back of the dell desktops?The lights on the back of the system are known as Diagnostic Lights. When the Diagnostic Lights are all lit up as green this means "The computer is in a normal operating condition after POST".



Here is a list of other combinations for the Diagnostic Lights on your system: http://support.dell.com/support/edocs/sy鈥?/a>



I hope this helps.What are the letters on the back of the dell desktops?where are the letters located - are they next to anything in specific ie a sound card or where the slots are or something ?



Best to check your manual whether its a hard copy or one online, that or call dell and ask them.What are the letters on the back of the dell desktops?what is your dell com #