2 Power-On Self Test (Boot Check)
Outline of POST
The set has a boot check function called POST (Power-On Self Test) in it. The condition of the main body is diagnosed by checking
beep sound or error code.
Start .............Test begins automatically when power switch is set to ON.
Normal finish .....After memory checking, a beep sound is issued once and the set is placed into automatic stop.
Note: If no error occurs, nothing is displayed. (No display of OK, etc.)
Error Diagnosis by Checking Beep Signal Sound
The beep sound is as follows:
(1 (long sound) -2-3-4)
(Length of bar shows length of sound.)
= long sound (about 0.4 sec.), = short sound (about 0.2 sec.), Length between sounds is about 0.1 sec.
Table of errors classified by beep sounds
DiagnosisBeep signal soundError message
Main board1(long sound)-2BIOS ROM error
1-2-2-3BIOS ROM error
1-3-1-1RAM error
1-3-1-3Keyboard controller error
1-3-4-1RAM error
1-3-4-3RAM error
1-4-1-1RAM error
2-1-2-3BIOS ROM error
2-2-3-1Occurrence of unexpected offering
(Note) A beep sound is also issued in case of other I/O trouble.
2-1 |
ACEC
PANASONIC
