HELP WITH EMPREX LCD MODEL LM-2203

[newbietech11]

I NEED HELP PLEASE ......MY EMPREX LCD SCREEN TURNS OFF AFTER A COUPLE OF SECONDS ...I TRIED THE FLASHLIGHT TRICK AND YOU CAN STILL SEE THE IMAGE..I DID RESEARCH AND IT MIGHT BE MY CAPACITORS..IM NOT SURE THOUGH..I DID A VISUAL INSPECTION AND NONE OF THEM ARE SWOLLEN OR LEAKING...I DONT HAVE A MULTIMETER SO I CANT DO A POWER TEST ..I PROVIDED PICTURES OF THE 2 BOARDS ...I AM HERE TO LEARN SO ANY PERSON OR TECHNICIAN WITH KNOWLEDGE AND EXPERIENCE PLEASE GUIDE ME IN THE RIGHT DIRECTION OF THIS REPAIR ...IF THERE ARE OTHER NECESSARY TOOLS OR PARTS THAT I NEED PLEASE TELL ME ...ANY HELP WILL BE GREATLY APPRECIATED THANKS

[sabre504]

Hi where abouts in the UK are you based

[lifeofgold]

If the "flashlight trick" to which you are refering is shining light throught the lcd screen to see if there is an image, and you can see an image; then you most likely need to replace either the backlight, or inverter board.

[CCL_Tech]

Hello and Welcome to our forums.

The power board you have uses SamXon brand capacitors which are well known to fail with no visible signs of failure. The type problem you are having indicates that the backlight circuit is shutting down but the logic board is still functioning because you still have a picture just no light. The causes of this are bad capacitors, bad solder joints on the transformers or backlight plugs, shorted driver chips that run the back lights, bad transformers or the back light tubes themselves. The first thing to do is resolder all of the connections on the back light sockets and the transformers that are next to them ( no cost to try first). Try the unit, it you still have the same issue then replace the capacitors. If that does not solve the problem post back with updates and we will go from there.