ViewSonic VX500PLUS-1 Service Manual page 44

2. No Display on Screen (LED is green)
Is the backlight lit?
YES
Check that the signal cable is fully
connected to JM9, JM10
YES
Check:
1.RM59 (FIG.9)
2.RM62 (FIG.10)
YES
Check ICM11
Pin4is low voltage
YES
Check ICM11
Pin5, 6, 7, and
8 is
About 3.3V
ViewSonic Corporation
NO
Failure point
The cable is
disconnected
NO
Failure point
1.ICM15, ICM16 failure
2.ICM11 failure
NO
ICM10 failure
NO
ICM17 failure
Check that the signal cable is
fully connected between the
Inverter and Interface board
The cable is disconnected
YES
Check JM2 pin1 is12V,
pin5 is 5V
YES
Inverter failure
41
Confidential – Do Not Copy
NO
NO
Failure point
ICM10 failure
VX500+-1
NO