On this page, We are going to learn about the full form of POST and the meaning of POST, As well as the meaning, definition, and acronym for POST in different categories. So you should read this post till the end.
The Full Form of POST: Power On Self Test
POST Stands for Power On Self Test. POST is a built-in diagnostic program that checks your hardware to make sure everything is present and working properly before the BIOS begins the actual boot.
The power-on self-test (post) is useful for checking whether your laptop is working or whether there is a problem with the laptop itself.
How to Work POST on a computer
When the main switch of the computer is switched on and there is an electric current flowing through it, we see all the information about the hardware installed on the monitor.
the computer knows which hardware component is working properly and which is not. The boot process proceeds if the above hardware is checked; otherwise, the computer does not boot.
When the computer is booted or restarted, both Macs and Windows PCs perform a POST. During the scan, the hardware was examined for proper functioning, such as the processor, RAM, and storage devices.
During POST, if an error occurs, the startup process may stop or completely stop, with an error message displayed on the monitor.
Post Error code Meaning
The BIOS information screen of the PC usually displays POST errors. In Macs, POST errors are usually indicated by a simple graphic, such as a broken folder icon that indicates that there is no bootable device. It can be output as coded messages, such as “08” for bad memory, or as system messages, such as “System RAM failed at offset.”
Some POST errors may not even appear until the computer screen is turned on. If this happens, error codes may be output via flashing LED lights or audible tones.
In an Apple iMac, three consecutive tones are played, followed by a five-second pause, followed by a repeat of the tone.
A faulty RAM will cause it to fail to start if it encounters a problem during startup. PCs also emit a beep when POST errors occur, although each manufacturer uses its own code.