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I have an LG tv service code 55LN5200-UB BUSULMR that has gone black on me. I have sound static but no picture I removed the back cover.

I see the backlights flick on when you power the set up but then they immediately go dark

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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SOURCE: sharp lc 20sh1e lcd tv funny picture

Do you still have this, I need a part myself and having trouble sourcing parts?
Mine immediately goes into standby mode and the screen just shows a white flash. I'm sure its just a power issue.
notallbad1@yahoo.co.uk

Posted on Jun 21, 2008

  • 517 Answers

SOURCE: My LG TV 50PJ350-UB TV KEEPS POWERING OFF

Good day!!!!


That problem is usually cause of faulty capacitors on the power supply board..

Just follow this instruction to fix your TV..

1. Open the back cover of your TV.
2. Look at the power supply board..Its normally connected to the power cord..
3. After that,,try to look at the actual image of capacitors if it is bulged on the top so that you can easily determine the bad capacitors..
4. After that,,try to replaced the bad capacitors using soldering iron and soldering lead..replaced the capacitors only with the same type ratings and value..
5. Some of the capacitors not bulged so its better if have a capacitance meter

Posted on Oct 07, 2011

SD Tech
  • 14553 Answers

SOURCE: I HAVE LCD/TV LG M227WA the picture and sounds are there but no backlight.what's the solution?

A backlight will either not light because of no voltage or no control (not being switched on by the set).

Posted on Apr 04, 2012

SD Tech
  • 14553 Answers

SOURCE: My LG TV 50PJ350-UB TV KEEPS POWERING OFF IMMEDIATELY AFTER I TURN IT

I see so many here with no sound/nopicture issues:

ISSUES:

1. IF sound main fuse/s are good.
2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.
3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.
4. Be safe and if you do not know what you are doing don't open the set.

Answers to issues:

1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.

2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.

Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.

What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.

3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.

4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.5_21_2012_12_05_46_pm.jpg5_21_2012_12_06_06_pm.jpg

Posted on May 21, 2012

gopakumarg43
  • 74136 Answers

SOURCE: lg led tv backlight

Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on Feb 05, 2015

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