Samsung LA22N21B Service Manual page 32

5 Troubleshooting
5-2 No Video (Analog PC Signal)
Power Indicator is off.
Lamp on, no video.
Yes
Check a PC source and check
the connection of DVI cable?
Yes
Does the signal appear at
1
#15, 19, 21 (R, G, B) of IC102
Yes
Does the digital data
2 appear at output of
RA101~RA104,RA106,RA107 ?
Yes
Does the digital data
3
appear at output of
RA555~RA559, RA561?
Yes
Does the digital data appear at
4
output of RA402~RA407?
Yes
Does the digital data
5
appear at output of
FT501~FT503, FT505?
Yes
Check a LVDS cable?
Replace a lcd panel?
(BN07-00114A, BN07-00125A)
5-2
No
Input a analog PC signal and connected
cable. (BN39-00310A)
Check IC102, PC cable. Change a PC
No
cable. Change a main PCB ass'y (BN94-
00496X).
Check a IC101 and IC107.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC565, IC105 and IC506.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC403.
No
Change a main PCB ass'y
(BN94-00496X).
Check a IC503.
No
Change a main PCB ass'y
(BN94-00496X).
No
Please, Call to Samsung Co. LTD.
LA22N21B