Daewoo DLT-26C2 Service Manual page 21

E. When "No Signal" in HDMI
1) First check if other inputs are working
=>If other inputs are not working, replace MAIN or SUB PCB
2) Second check IC705 (Sync switching IC) condition.
- 16 pin above 4.3V (IC B+)
- 9 pin is low
- 10 pin is high.
=> If other condition, replace MAIN PCB
3) Checking waveforms with Color Bar Pattern (Using the oscilloscope)
-Main TP (Clock): RC435(Top, Main) near IC401
-Main TP (H-Sync): RC437(Top, Main) near IC401
-Main TP (V-Sync): RC438(Top, Main) near IC401
=> If all TP signal does not appear, replace MAIN PCB.
1024 X 768, 60Hz
Clock (RC435 near IC401)
Horizontal sync (RC437 near ICD10)