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Definition: POST card

(Power On Self Test card) A diagnostic board that is plugged into a PC's peripheral bus in order to display the BIOS's POST codes on a built-in readout. The last POST code displayed before the system locks up identifies the problem area. POST codes are different for each BIOS vendor (but, of course!). See POST code.

This Ultra-X POST card plugs into a PCI slot and displays the POST codes on its readout (top right side). (Image courtesy of Ultra-X, Inc., www.uxd.com)

POST and More
This Ultra-X card has a POST readout as well as its own diagnostic tests. Results are displayed on a monitor or the built-in readout. (Image courtesy of Ultra-X, Inc., www.uxd.com)