I have a Samsung 46", LCD TV model# LN-S4695D The tv has vertical lines that are evenly spaced all across the screen. If I take the back off and point a fan at it, that seems to help a little. If I unplug it for a while that seems to help as well. The lines are usually red, white, and blue. If I bring up the menu the lines still show up behind the menu screen. The lines are not visible when there is no input going into the TV, just the normal blue screen. (No DVD player or cable plugged in) It has been suggested to replace the power board, T-con board, and main input or signal board. I am not sure what to do. Any suggestions???
SOURCE: LN-T4665F 46 in. LCD- Black Line across screen
The set is under a year old and is under warranty. The LVDS cable inside these sets have a history of coming loose. The problem could be the panel. Either way, the set is the problem and needs to be looked at. This set is worked on in the home and does not need to be taken to a shop, so, you can still use it. Contact Samsung at: 1-800-SAMSUNG Hope this helps.
SOURCE: Samsung LN-R408D - No Picture
My Mom's LNR408D also had sound but no picture. I was able to fix it by soldering in a jumper wire across a blown (1.5A ???) SMD picofuse on the "T-Con" board.
Consider attempting this ONLY if you:
0) Know enough to avoid the potentially fatal High Voltage parts of the power supply board!!!
1) Are a fearless hackazoid
2) know what you're doing with a soldering iron and teensie SMD parts
3) are gonna throw the busted thing out anyway so you have nothing to lose and won't be sad if you screw something up.
4) Know enough to avoid the potentially FATAL High Voltage parts of the power supply board!!!!!
This board is at the top center under a close fitting RF shield. The suspect part was labeled "CP" on the board and marked with "P" on the part. It is visible above the right-center of the connector from the main board. An ohmmeter showed it as open, so I bypassed it with a jumper wire from connector VIN to the hot side of C13. One image shows the suspect part and the jumper in place.
The other shows the TCON board placement top-center (under its RF shield). With care, it seems possible to test the fuse and put the jumper in place without removing the shield. (Obviously don't touch anything else with the VOM leads!)
Thanks to ZORBUS and Steve's TV and Electronics for the idea.
http://www.avforums.com/forums/lcd-televisions/892447-no-picture-but-got-sound-my-samsung-lcd.html
http://www.gesda.com/transformer/Fall08_files/Page336.htm
Steve C
SOURCE: LN-T4671F 46 in get loud clincking sound when tv
power supply is probably about to fail. will probably start to cycle on/off by itself.
SOURCE: I have a LN-T4061F Samsung LCD, I'm seeing
most of the time this is the ctrl board its like a graphic card tells the screen what to show,but the cable from that goes to main board sometimes this is the cause of lines/open it get no of control board it has a 30 pin thin lead going to main board and google it easy to replace plug n play
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