Samsung SyncMaster 570BTFT Service Manual page 15

4 Troubleshooting
4-2 No Video
Power indicator is green
Does the clock pulse
appear at output of
R190, R191, R193?
Yes
18 19
Does the sync pulses appear at
Pins 20 and 22 of IC192?
Yes
2 3 4 5
Do the sync pulses appear at
Pins 22, 23, 25 and 26 of IC310?
Yes
6
Do the waveforms appear at
Pins 5 and 20 of CN301?
Yes
Replace LCD Panel
4-2
7
No
Does the H-sync pulse appear
at Pin 94 of IC101?
Yes
Replace IC101.
20 1
No
Does the sync pulses appear at
Pins 34 and 39 of IC192?
Yes
Replace IC192 or check its
related circuit.
10 11 12 13
No
Do the sync pulses appear at Pins
2, 3, 54, 55 and 56 of IC301?
Yes
Replace IC305 or check its
related circuit.
No
Replace IC310 and IC311 or
check its related circuits.
No
Does the pulse appear at Pin 10
of IC105 or Pin 1 of IC104?
Replace IC106.
Replace IC104 (SOG)
or IC105 (seperate sync.
No
Check IC101 and IC401.
14
No
Replace IC301 or check its
related circuit.
SyncMaster 570BTFT/580BTFT
8 9
No
Yes