menguji kinerja komputer 11 mei 2018

power on self test

POST (Power on Self-Test) is a test performed by the PC to check the functions of PC support components whether working properly. POST is done by PC at boot time, if PC experience a problem it will be able to detect symptoms kesalahannnya through POST, PC will give message / error warning in the form of sound generated through speaker or visual appearance in monitor. 

1) POST procedure (Power on Self-Test)

POST is done shortly after the computer starts and starts booting, this process is done by BIOS. The sequence of POST procedures is as follows:

a) The Power Supply test is marked with a live power lamp and a rotating power supply cooling fan.

b) Automatically reset to CPU work by a good power signal generated by the power supply if it is in good condition at the time it is turned on, then the CPU starts executing the initial instruction on the BIOS ROM and so on.

c) Checking the BIOS and its contents. The BIOS should be legible. The initial ROM BIOS instruction is jump (jump) to the POST program address.

d) Checking against CMOS, CMOS should work properly. The POST program begins with reading setup data (initial hardware settings) in CMOS RAM setup, as reference data for checking.

e) Conducting CPU, timer, direct access memory control, memory bus and memory module.

f) A 16 KB memory must be available and readable / written for BIOS ROM purposes and store POST code.

Users can immediately find out the problem by reading the warning text. For example:

Keyboard error: for problems with the keyboard

CMOS error: cmos battery error or there is a problem with peripheral settings


HDD not Install: hard drive not installed




first wait for the process when boting

and wait for the boot process

wait while the computer livelihood process

and live computer

after that we check the computer lights

then we check the computer specifications

after that type dxdiag

and we can see the results of computer diagnosis