Sharp LL-T17A4-H Service Manual page 13

3. Show "No Signal " on screen
Check IC400 Pin127 same as
V-sync of input
4. color interference
(Test patern: 32 Gray 1280 x 1024@60Hz)
Check CN602 Pin13, Pin14
YES
Check IC400 Pin126 same as
H-sync of input
YES
IC400 failure
Check signal cable fully connected between
signal source and Interface Board
YES
Check CN602 Pin1, 2, 3
RIN, GIN, BIN
IC400 failure
LL-T17A4-H/B TROUBLE SHOOTING
5 – 2
NO
Signal cable is not
fully connected
NO
D619 failure
NO
D618 failure
NO
The Signal cable not fully
connected
NO
D614, D615, D616 failure