Power-on self-test (POST)

Power-on self-test (POST)

Each time you power-on the system, it performs a series of tests that check the operation of the system and some options.
This series of tests is called the power-on self-test , or POST.

POST does the following:

If the POST finishes without detecting any problems, a single beep sounds and the first screen of your operating system or application program appears.

Note: Type 6563/6564/6565/6574/6868/6878 computers default to come up quiet (No beep and no memory count and checkpoint code display) when no errors are detected by POST.

To enable Beep and memory count and checkpoint code display when a successful POST occurs:
  1.  Enable Power on Status in setup. See 'Setup Utility Program'.

If the POST detects a problem, an error message appears on your screen.
A single problem can cause several error messages to appear.
When you correct the cause of the first error message, the other error messages probably will not appear on the screen the next time you turn on the system.

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