Vivitek DH268, Service Manual

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(3) Confirm cable connection well.
Note: Swapping modules that may be defective with others known to be good is generally an ideal
way to find the module responsible for the problem. A failure symptom is rarely caused by more than
one module, so you will not usually need to replace more than one to correct a particular failure.
Whatever main board, ballast, IR board, power board, lamp module or optical engine are all suitable
to check by swapping modules.
3.2 Main Procedure
Power Source Troubleshooting:
No Power Source
after turning on
Replug AC socket
Replace AIO power
board
OK
OK
NG
NG
Check 9 pin
Power output
Check AC socket
connection
Replace main
board
Fan failure after
turning on
Reconnect fan
Replace fan
Replace Main
board
NG
NG
NG
OK
OK
Check
Main board
Check
Fan
Check fan
connection