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April 30th, 2026 02:08

Error

Error code 0146 or 2000-0146 my PC is Dell computer optiplex 780

12 Elder

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31K Posts

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153.6K Points

April 30th, 2026 10:49

The hard drive has either failed or is failing and needs to be replaced.

2 Intern

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40 Posts

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159 Points

May 6th, 2026 12:24

These codes indicate a Hard Drive failure. This is extremely common with Optiplex 780 systems after aging. 

It's best to replace the drive with one that was manufactured more recently. You can also buy a SATA SSD and a 3.5" adapter to fit in your systems. 

https://dl.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-780_service%20manual2_en-us.pdf

Check Page 35 to remove and install a new Hard Drive.

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