Dell OptiPlex 990 Support Question
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Question posted by stwrSCDM on January 13th, 2014
Dell 990 Diagnostic Lights 1,2, And 3 Light On Pc Will Not Boot
Current Answers
Answer #1: Posted by prateekk007 on January 14th, 2014 2:55 AM
It seems to be an issue with the coin cell battery. You may try to reseat the coin cell battery and check if that helps. Click on the link given below and refer to page number 37 to get the instructions for removing/installing the coin cell battery:
Please reply if you have further queries.
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Prateek K