Hyundai HLT-1751 Service Manual page 25

TV board troubleshooting
No picture but have raster.
Measure the waveform of
R.G.B Hors, Vers at X7.
No
Check whether N1 has
5V power supply.
Yes
Measure N1 pin 33, pin 35
waveform.
Yes
Measure N1 pin 42, pin 44
waveform.
Yes
Check V105-V107's
output waveform.
Check whether X9 pin 1, pin 2 have
No
5V power input.
No
Replace N2
No
No
Replace V105-V17.
24
No
Replace N1