Dell OptiPlex 990 Support Question
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Question posted by djskinn on September 19th, 2013
Optiplex 990 Does Not Boot After Bios Flash
Current Answers
Answer #1: Posted by DreadPirateRoberts on October 16th, 2013 8:44 AM
http://www.dell.com/support/troubleshooting/us/en/19/KCS/KcsArticles/ArticleView?docid=496582
For laptops
If you are not hearing post beeps, it's always worth trying a Hard Reset as follows.
Shut down the notebook, unplug the AC Adapter and then remove the battery.
Hold down the Power button for a full minute. Re-insert the battery,
plug in the AC Adapter and start the notebook.