ViewSonic PJD6531w Service Manual page 32

Power Source Troubleshooting:
No Power
Source after
turning on
Check AC socket and
connector
OK
Check
Safety Switch
OK
Check LED and keypad
FFC
OK
Check 7 pin
Power output
OK
Replace
main board
ViewSonic Corporation
NG
Replace AC
socket
NG
Replace power
board or reinstall
NG
Replace keypad
and FFC
NG
Check
Fuse
OK
Replace
power board
Fan failure after
turning on
NG
Check fan
connection
OK
NG
Check
Fan
OK
NG
Check
Main board
NG
Replace fuse
31
Confidential - Do Not Copy
Reconnect fan
Replace fan
Replace
Main board
PJD6531w