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

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.

Set cannot be supplied with current. Power lamp fails to light up.

Dark display on screen.

Screen fails to display.

Failure in starting

ACNG Adaptor/Battery

Output voltage

 

OK

 

 

 

Power lamp

 

NO

check

YES

 

Inverter board

 

NG

 

OK

 

 

 

LCD back

 

NO

light lighting

 

 

 

 

YES

NG

LCD unit

 

check

 

 

 

 

OK

 

 

 

BIOS operation

 

NO

check

 

 

 

 

YES

Result of

NG

 

POST

OK

 

 

 

 

 

 

 

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.

 

 

 

 

 

Not displayed properly on screen.

 

 

 

NG

 

 

 

 

 

 

 

Set-up utility

 

 

 

Heavy trouble e.g.,

 

Replace main board.

 

 

 

 

starting

 

 

 

 

 

 

 

‘Set cannot be turned

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OK

 

 

 

 

 

 

 

 

ON’, ‘Set fails to start’,

 

 

 

 

 

 

 

 

 

 

‘No display on

 

 

Return set-up utility setpoint to the state of ‘delivery from factory’.

 

screen’, etc.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NO

Check HDD cable connection and continuity.

 

 

 

 

 

HDD access

Replace if defective.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace HDD & Reinstall.

 

 

 

 

 

YES

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Replace main board.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Main board

NG

 

 

 

 

 

 

 

 

Replace main board

 

 

 

 

 

 

 

check

 

 

 

 

 

 

 

 

 

 

 

Some or all keys cannot be input.

OK

Make sure of contact of K/B connector in use. Replace keyboard or main board.

Each kind of trouble in operation.

DVD/CD CALL not practicable.

*Clean DVD-ROM drive with an applicator.

Starts but operates unstably.

TroubleNO symptoms on some

of DVD or CD

YES

Replace DVD drive.

Replace main board.

Reinstall HDD.

Replace main board.

STARTEND

Check if there are any flaws on DVD or CD media. Since flaws may appear on specific media, DVD or CD media can be defective.

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Panasonic CF-74CCBAXBM manual Troubleshooting

CF-74CCBAXBM specifications

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