Panasonic CF-19ADUAX M Series Service Manual page 16

4.2. Troubleshooting
Please take note of the following two points with regard to troubleshooting:
1. Know-how of diagnosis upon occurrence of heavy troubles, e.g. Set cannot be turned ON , Set fails to start , No display on
screen , etc.
2. Explanation of each trouble, mainly symptom of trouble in operation.
Flow Chart
START
START
Set cannot be supplied with current.
Power lamp fails to light up.
Dark display on screen.
Screen fails to display.
Failure in starting
Not displayed properly on screen.
Some or all keys cannot be input.
CD CALL not practicable.
Starts but operates unstably.
Pay attention to the following points when in pursuit of the cause of a troubleshooting.
1. Peripheral apparatus connected with the set should all be removed before operation check.
2. Make sure that cables, boards, etc. are not coming off, and recheck the contact condition.
NG
AC
Adaptor/Battery
Output voltage
OK
NO
Power lamp
check
YES
NG
Inverter board
OK
NO
LCD back
light lighting
YES
NG
LCD unit
check
OK
NO
BIOS operation
check
YES
NG
Result of
POST
OK
NG
Set-up utility
starting
OK
Return set-up utility setpoint to the state of delivery from factory .
NO
HDD access
YES
NG
Main board
check
OK
Make sure of contact of K/B connector in use.
Replace keyboard or main board.
NO
Trouble
symptoms on some
of CD
YES
Replace main board.
Reinstall HDD.
Replace main board.
END
4-2
Replace AC Adaptor/Battery
Check contact condition of power input terminal. Replace if
defective.
Check Power SW. Replace if defective.
Replace inverter board.
Check inverter cable continuity. Replace if defective
Replace LCD back light.
Replace LCD unit.
Replace main board (Check fuse at power source).
Refer to POST
Replace main board.
error code table.
Replace main board.
Check HDD cable connection and continuity.
Replace if defective.
Replace HDD & Reinstall.
Replace main board.
Replace main board
Check if there are any flaws on CD media. Since
flaws may appear on specific media, CD media
can be defective.
Heavy trouble e.g.,
Set cannot be turned
ON , Set fails to start ,
No display on
screen , etc.
Each kind of
trouble in
operation.