What does ABCDE letters on a dell cpu stands for

the letter B is showing orange colour instead of green. whats wrong and it is causing my screen all types not to respond
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More about what abcde letters dell stands
  1. Go here http://support.dell.com/support/edocs/systems/ and select your model or just post what model your dell system is.

    Once you get to your system in the edocs, you can look up the Diagnostics Lights Manual and it will tell you what combination of lights means what.
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