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The OptiPlex 755 is an energy-efficient desktop computer designed for businesses. It was released in mid 2007.

No boot device available

My computer will not start up. Cannot find boot device. What is most likely cause?

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@erichinkle most common issue would be a failed hard drive.

On startup hit the F2 button (may take a couple of times) to enter the BIOS. Once you are in the BIOS check for a boot devices. See if your computer can still find your HDD.

You could also try and set the boot order to USB and get a bootable USB drive. Boot from that and try to access your HDD. I use Puppy Linux Live CD installed on a USB flash drive and use it to gain access.

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Eric Hinkle crwdns2934231:0crwdne2934231:0
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