what is post card in computer
POST card is a diagnostic device that displays error codes and progress during its power-on self-test (POST) process. Hardware technician uses POST card when the computer does not start up or it can not read from the hard drive. The system generates codes to a specified I/O port (usually 80 hex) during startup, indicating different stage of startup or error message. The codes are well-documented, so the technician can easily understand what is going on.
The value of the card lies in the fact that the tests can be carried out even if the system is completely disconnected from its hard drive.
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