LL-T17A4 (serv.man8). Complete - Sharp Monitor Service Manual (repair manual). Page 13

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