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.
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.
When the TV is on, use a flashlight to shine on the screen. If you can see a picture it's the bulb or inverter. The screen will look similar to an old LCD calculator (grey, monochrome) when the flashlight is on it.
Sounds likely it's overheating. Unplug tv, pull control panel vacuum or blow all the dirt and pet hair and stuff off the fans and control board. Make sure vents are clear, replace panel, plug tv in. Hopefully this helps!
To select a proper universal remote control, you should know about the number of digits to its set-up codes. There are 3 digit, 4 digit, 5 digit, 2 digit and even single digit codes, to some brand devices. After confirming this, check the sites linked here. Both the sites have set-up code list and set-up procedure to many popular brand remote controls. Check which brand remote control has set-up code/s to your device brand, and buy that one according to availability. Brand name of the remote control isn't a matter, but it should have set-up codes in its code list, to the device brand you have.
Please note: Every new universal remote control will have set-up code list, and set-up procedure along with its pack. Never accept a remote control, that hasn't both of this. For more details about the set-up codes, visit the sites Check this site too.
http://remotesearch.blogspot.com/http://electrohelponline.blogspot.com/
Universal remote controls are available at most of the electronic spare part selling shops. Visit some online sites too, which deals with electronic spare parts.
I had an LG 37" LCD that did this to me. Turned out to be bad solder joints on the side button board. Just reflowed and it starting working fine.
But now that I think about, I had another set do the same thing, only it wasn't the button board. I had to upgrade the TV's firmware via the USB service port. Just needed a USB flash drive and downloaded the firmware from the mfg's website. There were easy to follow instructions there too!
you will first need a video player,then a product called "video capture" will plug into the usb port and has the 3 video wires on it ( usually red,white and yellow). simply plug the vcr into them wires. heres a link to the type of capture device you will need. https://www.google.co.uk/search?q=video+capture+card&es_sm=122&source=lnms&tbm=isch&sa=X&ved=0CAgQ_AUoAmoVChMIusaljMyOyQIVgroUCh2KUwSj&biw=1366&bih=643#tbm=isch&q=usb+video+capture+card&imgrc=_ hope this helps
download.lenovo.com/ibmdl/pub/pc/pccbbs/netvista/06p1790.pdf
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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://electronicshelponline.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.
Hi Neil
Assuming the power supply is in good order!
I am not familiar with your particular model!
The power supply is either shutting down from too much current draw or it's sensing a fault.
Can the power supply be isolated? Does it work without a load?
This will depend on your connection points.
Power supplies them selves are the cause of most failures in modern TV's as they handle the AC & the load & the temperature etc. Check for puffer up Electrolytic capacitors on the power supply board. Caution... you can get a nasty kick of the AC side.
An Example
How to Replace an Electrolytic Capacitor
Fault to the main power supply regulator section. 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. Surf the site with patience. 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.
