Hello I have a Samsung TV and the screen went black but I have sound but no picture I've searched in the search and only found 3 posts about this prob can somebody help me thank you I was told its ether the backlight inverter or the power supply
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samsung LM46c630
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Re: samsung LM46c630
Schematic
http://www.tgohome.com/ServiceManual...&Search=Submit
When you post pics, we can highlight where to make checks.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: samsung LM46c630
Just realised this might be the set with a jumper marked JP852 on the power board, do you see that? If so cut this jumper, it disables a low-voltage cut out which was set incorrectly by Samsung and causes problems later on.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: samsung LM46c630
You can leave it cut for now. Now, unplug the connector running between the main board and power board, the backlight of the LCD should come on, does it? The main board has the video inputs on it.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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Re: samsung LM46c630
Don't worry about the LED, We are just looking to see if the backlight came on. If not, It's either the power or Balancer board. (the one on the side). The inverter on the power board is probably the problem. Is there even a quick flash of backlight? If you shine a flashlight on the screeb can you see a picture? It can be hard to see and you may have to shine at an angle.
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Re: samsung LM46c630
OK, this power supply-inverter board has built-in pullup resistors, so if you disconnect the cable between the power supply and the main board, when you plug the TV into the outlet, the backlights should come on and stay on right away to indicate that the board is OK.Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809
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Re: samsung LM46c630
So if you look from the rear of the set, you can see a brief white light through the holes in the metal plating?Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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