I have a Samsung LN40B630N1FUZA that was manufactured in February 2010 and purchased in April 2010. The TV was not used heavily the past four years and was recently unplugged (several hours after being powered down) before we went on a vacation. When we returned the TV was plugged back in and attempted to be used the next day. The TV powers on, I hear the startup sound, but get no picture and no OSD when the MENU button is pressed on the remote. If I play a DVD or use another input, I can hear sound and see a faint, clear picture if I shine a very bright flashlight close to the screen. I have not been able to get any decent estimates to repair the TV, so when I found this forum I decided to try some of the items I had found for this specific model.
I removed the back cover and the Power/Inverter board (BN44-00264A) for inspection. I found no burnt traces, no bulged caps, the two fuses (FS801 and FS802) checked okay and I obtained the following readings (taken with a Fluke 23III DVOM on Ohms Auto-Range) when going across the Bridge Rectifier (as seen in another thread) -
1 - 2 = 1.51 M Ohms
1 - 3 = 1.52 M Ohms
1 - 4 = Moved from 15 M Ohms to 2 M Ohms over a period of about a minute
2 - 3 = 0.896 M Ohms
2 - 4 = 1.494 M Ohms
3 - 4 = 1.541 M Ohms
If anyone has any ideas how to isolate a component failure on this board, or determine if the Logic Board or T-Con Board is the issue, I would greatly appreciate the help. I have access to a DVOM, soldering iron, etc., but no scope. I can read the wiring schematic for the board and know what most of the symbols mean, but do not have enough knowledge to develop a troubleshooting method. Thanks in advance for anything you can provide!
I removed the back cover and the Power/Inverter board (BN44-00264A) for inspection. I found no burnt traces, no bulged caps, the two fuses (FS801 and FS802) checked okay and I obtained the following readings (taken with a Fluke 23III DVOM on Ohms Auto-Range) when going across the Bridge Rectifier (as seen in another thread) -
1 - 2 = 1.51 M Ohms
1 - 3 = 1.52 M Ohms
1 - 4 = Moved from 15 M Ohms to 2 M Ohms over a period of about a minute
2 - 3 = 0.896 M Ohms
2 - 4 = 1.494 M Ohms
3 - 4 = 1.541 M Ohms
If anyone has any ideas how to isolate a component failure on this board, or determine if the Logic Board or T-Con Board is the issue, I would greatly appreciate the help. I have access to a DVOM, soldering iron, etc., but no scope. I can read the wiring schematic for the board and know what most of the symbols mean, but do not have enough knowledge to develop a troubleshooting method. Thanks in advance for anything you can provide!
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