I have an element tv that isn't displaying picture only sound.

JP Meneide

• 483 Answers
• Posted on Oct 14, 2015

SOURCE: What is the voltage from this power supply CVB42001 Board, that supplies the Back light LEDS?? The 12v out on this board are OK. We have a Backlight problem with this set Tks

Hello 4thrs,
Check for Bad Caps.
Here is a link that may be useful to you.
Good Luck!
JP
http://www.badcaps.net/forum

Testimonial: "All Caps are OK, not bulging, well within ESR spec."

SOURCE: When testin a power supply or led board on tv do i test dc or ac with multimeter?

Your power supply board is working if you get audio and imgaes.

You test AC only the AC side of the transformer before the Rectifier Diodes. Everything after the Diodes will be in DC.

did you get to see any spec of backlight as shown in
LCD LED TV Repair No Image Blank Black Screen Flashlight Test How to Fix...

Electro Med Services

• 6694 Answers
• Posted on May 10, 2016

SOURCE: How do I repair a no backlight problem

Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis....
http://electro-medical.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement. To some models sets, the back-light inverter and SMPS section circuit will be integrated at its main board itself. If so; the main board should be replaced. To some models of sets, all these section circuit will be integrated at its main board. If this is the case, you have to replace the main board.

The Knight

• 76851 Answers
• Posted on Feb 10, 2017

SOURCE: 2nd try see last sentences....lg led 32ln5310 tv, sound but no picture, no backlights, nothing visible on flashlight test, what should I replace? Main board, T-Con Board, Power Supply board or Leds

The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.
Search the site by type in the "brand name" to your device; in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

Russ Hill

• 4057 Answers
• Posted on May 24, 2017

SOURCE: How can you tell if your screen is bad on a Samsung SUHD TV after you do the flashlight test and all back LEDs are working?

the t-con board would be the problem if there is sound and back light working then is more likely to be this board.