Question about Samsung LN40B500 40 40" HDTV LCD TV
Tv is faulty and need for repair
Posted on Dec 28, 2014
I experienced a similar situation.Purchased a side button PCB assembly BN9607269A for ~ $10.00 delivered from
Here were my symptoms:
A. Plug in the TV and it turns on without pushing side On Button or Remote Power Button. (I even removed the remote batteries to be sure)
B. Bottom right Red LED constantly blinking without any input.
C. Volume Maxed out and couldn\'t be lowered with remote or side button.
D. Menu picture selections would all Max out or go to the final choice. With some Side button manipulation using the menu and channel selection buttons, I could temporarily disrupt the constant menu cycling.
Good Luck and be safe; don\'t work on energized equipment.
Active US Postal Service Electronics Technician
Retired Electronics Technician US Navy
Posted on Dec 24, 2014
Probably you have defect mainboard .
Posted on Oct 17, 2013
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Posted on Jan 02, 2017
yes sir..i think you must looking and buy VGA adapter 15 to HDMI complete with the HDMI cable set. you can find this adapter at the computer spare part store or electronic part store. not cheap but very usefull for you in the next day.
is very easy to connecting...plug you adapter to the output VGA VAIO.. connect the HDMI cable to adapter (like USB) and the rest to the input at your samsung lcd...good luck..
Posted on Jan 31, 2009
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.
Posted on Sep 22, 2009
if you can do soldering work, replace two 1000uF10v bulging capacitor with 1000uF 16v or 25v in powersupply board. you will save $200.
Posted on Nov 12, 2009
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