davidc49erz , David, your computer may emit a series of beeps that identify the problem why it will not start. The beep code is a pattern of sounds: for example, one beep, followed by a second beep, and then a burst of three beeps (code 1-1-3). Link below is Dell™ OptiPlex™ GX150 System User's Guide. scroll about 3/4 down the page you will see all the beep codes, causes and possible solutions. Good luck.

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https://downloads.dell.com/manuals/all-p...