CMOS Jumper
POST or Power On Self Test (POST) is a series of built-in diagnostics performed by the BIOS when the computer is switched on for the first time. POST checks if the major components such as keyboard, hard disk etc are working as expected.
The following table shows the series error codes you may encounter during POST. The device failing the test can be identified by the error code displayed on the screen.
| Error Codes Table: | |
| Error Code | Device |
| 100 Series ( 100-199): | System Board or Motherboard |
| 200 Series ( 200-299): | Memory or RAM |
| 300 Series ( 300-399): | Keyboard |
| 400 Series ( 400-499): | Monochrome Video |
| 500 Series ( 500-599): | Color Video |
| 600 Series ( 600-699): | Floppy Drive |
| 1700 Series ( 1700-1799): | Hard Drive |
