Panasonic CF-74CCBAXBM User Manual

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.

z Start .............Test begins automatically when power switch is set to ON.

z 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.)

The beep sound is as follows:

 = long sound (about 0.4 sec.),        = short sound (about 0.2 sec.), Length between sounds is about 0.1 sec.

 z Table of errors classified by beep sounds

(1 (long sound) -2-3-4)

(Length of bar shows length of sound.)

Diagnosis

Beep signal sound

Error message

1(long sound)-2

BIOS ROM error

BIOS ROM error
RAM error
Keyboard controller error
RAM error
RAM error
RAM error

1-2-2-3
1-3-1-1
1-3-1-3
1-3-4-1
1-3-4-3
1-4-1-1

BIOS ROM error

2-1-2-3

Occurrence of unexpected offering

2-2-3-1

Main board

(Note)  A beep sound is also issued in case of other I/O trouble.

5-1