Samsung LTM1555(B) Service Manual page 14

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