NEC MultiSync FP1350 - PMS FAILURE 2(When a Monitor Receives no Horizontal Sync); PMS FAILURE 3(When a Monitor Receives no Vertical Sync); PMS FAILURE 4(When Monitor Receives Neither Horizontal nor Vertical Sync)

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11-2. PMS FAILURE 2(When a monitor receives no Horizontal Sync)
Check the PMS control voltage. Check the voltage of pin 22 of IC801.
The voltage should be approx. 5V.
NG
IC801 or IC7A1 may have failed.
OK
SW/HV may have failed. (see item 13)
11-3. PMS FAILURE 3(When a monitor receives no Vertical Sync)
Check the PMS control voltage. Check the voltage of pin 22 of IC801.
The voltage should be approx. 0V.
NG
IC801 or IC7A1 may have failed
OK
SW/HV may have failed. (see item 13)
11-4. PMS FAILURE 4(When monitor receives neither Horizontal nor Vertical Sync)
Check the PMS control voltage. Check the voltage of pin 8 and 22 of IC801.
The both voltages should be approx. 0V.
NG
IC801 or IC7A1 may have failed.
OK
IC8G1, IC8G2 may have failed.