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Released March 2006, identified by model D620 on the keyboard bezel.

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Error Message No Diagnostic Utility partition identified

In the initial pre-boot everything passes. I don't even know where to start with that error.

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Hi,

Can you get into BIOS and see if you can change the boot order back to your OS HDD? I have a feeling that the Diagnostic Utility partition is missing (have you upgraded to Win10?)

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@lsnell Are you trying to install an OS ? Have you installed a new HD or SSD. What was done prior to the error?

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Most Helpful Answer

Try this thread: http://en.community.dell.com/support-for...

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