Question about Samsung LN-R408D 40 in. LCD HDTV
I have a samsung LN-R408D with just a blank screen. It was connected via HDMI to an amplifier.
TV powers up, and LCD panel turns greyish, so i assume power is OK, but no Image. Thought it was the HDMI port, so conneted a DVD player via RCA cable (Yellow / Red / White). DVD Audio can be heard through the TV speakers but no picture. Samsung troubleshooting talks about maybe contrast / brightness turned down to minimum by error, but even when i press the menu button on remote, i dont get anything on the screen.
So looks like a bad panel or board or something. Please help.
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.
Posted on Sep 22, 2009
That P type fuse is a 3 amp 32v fuse.
Posted on Oct 09, 2009
I'm having the same problem. I put a new t-con board on but that didn't fix it. What else should I try?
Posted on Dec 08, 2011
Reseat the LVDS cable inside the unit. this is the cable from the main board to the panel. if the problem is still there then replace the main board 1st, part # BN94-00629F. if the problem is still there then the panel is bad, part # BN07-00245A. if you are not familar with TV repair have a tech repair this for you, if it is under warranty call the manufacturer for nearest repair place.
Posted on Feb 26, 2008
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