Question about LG 37LG30 37 in. LCD HDTV
Lately, the image and sound went off and we could hear a tickling sound inside the TV. After checking everything regarding possible power problems, nothing from the troubleshooting appendix helped solve the problem. Could it be the power supply board? Is it a good idea to buy a new one to replace it?
SOURCE: LG 42pc3dv-ud
Yes you need to replace the board LG 6871QYH048B. The board has a short. Check the fuses and one of them should have no continuity
because it is open.
Replace that board and problem solved
Posted on Aug 03, 2009
It generally depends on how thick the bar is. If it is directly in the center, it is possible that your Time Control/LCD Control board needs to be replaced.
However, there is a chance that the TCON/Control board alone will not fix the issue, and you will need to replace the LCD Panel.
Depending on your initial cost, the presence of a warranty--extended or otherwise--and your willingness to get it repaired, you may want to consider another set.
Expect to pay around $200-300.00 in labor costs to put an LCD panel in, and the cost of the panel can be quite exorbitant.
Posted on Jan 24, 2010
The "Cable receiving coupler" looks like either a PCB or panel mount F-type coaxial connector (coax connector for short). It may be possible to remove the tuner ("cable receiving box") from the main board and replace the connector - it depends on how much damage was done to the tuner. If the circuit board is broken and components torn apart, it is probably better to replace the tuner or the entire board assembly.
I have successfully patched torn or blown foil traces around the coax connector - the key is to make sure any copper foil tape or wire used for patching matches the original shape of the printed circuit traces as closely as possible. Avoid distorting any wire coils mounted on the tuner circuit board, and observe electrostatic discharge precautions to make sure you don't blow out the glass gates inside the tuner's transistors (at a minimum keep one hand in contact with the metal side walls of the tuner while you work on it). If you have a crack in the board material, glue it back together with clear (not metal-filled) epoxy and let it cure before doing any other repairs.
If the connector is broken, contact the sales department at MCM Electronics. It's hard to tell for sure without opening the tuner, but the connector I saw in a picture of the board (costs more than the one on eBay) looks identical to the one used in many RCA tuners. (The RCA part has a flange for soldering to the tuner shield and a single pin extending down to the tuner board.) Most PCB mount coax connectors have a four-pin box-shaped shielding base around the center pin.
In short, repairing the tuner may be an option to replacement.
The best price I've found for the main board is $98.95 at Shop Jimmy (180 day warranty). I could not locate a separate tuner.
Posted on Jan 27, 2011
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