ViewSonic PJD5112 Service Manual page 32

Power Source Troubleshooting:
No Power
Source after
turning on
NG
Check AC socket and
connector
OK
NG
Check
Safety Switch
OK
NG
Check LED and keypad
FFC
OK
NG
Check 7 pin
Power output
OK
Replace
main board
ViewSonic Corporation
Replace AC
socket
Replace power
board or reinstall
Replace keypad
and FFC
Check
Fuse
NG
OK
Replace
power board
29
Fan failure after
turning on
NG
Check fan
connection
OK
NG
Check
Fan
OK
NG
Check
Main board
Replace fuse
Confidential - Do Not Copy
Reconnect fan
Replace fan
Replace
Main board
PJD5112