POST process (Power-On Self Test)
Short for power-on self-test , the POST is a test the computer must complete to verify all hardware is working properly before starting the remainder of the boot process. The POST process checks computer hardware, like RAM (random-access memory), hard drive , CD-ROM (compact disc read-only memory) drive, keyboard , etc., to ensure everything works correctly. If all hardware passes the POST, the computer continues the boot up process and may generate a single beep sound. If POST is unsuccessful, it generates a beep code to indicate the error encountered, and the computer will not boot up. All POST errors relate to hardware issues with one of the components in the computer. A power-on self-test (POST) is a set of routines performed by firmware or software immediately after a computer is powered on, to determine if the hardware is working as expected. The process would proceed further o...
