IBM 9493-AW1 Service Manual page 16

3. NO RASTER (OSD IS NOT DISPLAYED) – MX88L281
NO RASTER
(OSD IS NOT DISPLAYED)
U1
POWER PINS
3.3V?
YES
U1 PIN60, 61
OSCILLATE AS 14.3M?
YES
IS APPEAR
LOW VOLTAGE SIGNAL
AT J2 ?
YES
J2 PIN4
5V?
YES
TROUBLE IN CABLE
OR LCD MODULE
NO
NO
NO
NO
- 16 -
CHECK U24
1. CHECK PIN59, 60
SOLDERING CONDITION
2. CHECK X1
3. TROUBLE IN U1
CHECK SOLDERING
STATE OF U16
CHECK U12