Samsung PDP4298EDX/SMS Service Manual page 58

5-5-3 Troubleshooting
There are several reasons an error can occur on to the logic board. The following flow charts show
solutions to many problems.
5-5-3(A) No Screen Display Output
NO
Check the detailed waveforms.
(Need to switch to the
internal pattern)
5-5-3(B) Screen Error
Check the detailed waveforms
(Refer to the Inspection
Procedure attached.)
Samsung Electronics
YES
Check the operational status
of the LED indicators.
Check the detailed waveforms.
(Refer to the Inspection
Check the operational status
of the LED indicators.
Replace the 256K EEPROM
and check again.
Check the internal patterns.
Check the power inputs.
YES
Replace the 256K EEPROM
and check again.
Check the internal patterns.
Procedure attached.)
Check the video board.
YES
Screen error of a specific COF block.
Check the buffer board.
Circuit Operation Description
NO
Check the power cable
connections.
Check the fuse.
Check the inductor on the
power terminal.
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