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5 Troubleshooting
5-2 LTM1555(B)/LTM1755(B)
5-2 No Video (PC Signal)
Power indicator is green.
Does the signal appear
at IC134, IC135, IC136
of R, G, B input?
Check CN11.
Yes
Yes
No
Does the clock pulse
appear at X21?
Check X21 and related circuit of X21.
Yes
No
Does the clock pulse appear at
output of <RA35~RA39, RA310>15”
<RA35~RA39, RA310, RA313~318>17”.
Check related circuit of IC32.
Yes
No
Does the clock pulse appear at
output of <R611~R620>15”
<R611~R620, R61~R69, R610>17”.
Replace
<R611~R620>15”
<R611~R620, R61~R69, R610>17”.
Yes
No
Replace LCD Panel.