Daewoo LA37L1B1LM Service Manual page 23

Hardware Trouble shooting
B. When "No signal" in HDMI
1) First check if other inputs are not working
=>If other inputs are not working, replace MAIN PCB
2) Checking waveforms with Color Bar Pattern(Using the oscilloscope)
-Main TP(HDMI1_Clock) : PIN35 near IC201(TOP)
=>If all TP signal does not appear, replace MAIN PCB.
V-Sync(RC206)
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