20 Most Recent Samsung LE40R72BDX 40 in. HD-Ready LCD Television - Page 5 Questions & Answers

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/ Blinking codes details to many popular brand TVs are given. Surf the site with patience. If blinks continue without any pause, the main board is faulty.

you will need to replace the leaky capacitors in the power supply circuit. You can locate the faulty capacitors with a visual check. Those that are bulging need to be replaced.

i need the model,but the problem is in the T-con board.

Most likely the power supply capacitors. you can identify them by their bulging tops.

Hate to give you some bad news...But, It sounds like you have a bad screen. Samsung had several issues with the screens on this model. You may get lucky and may have a bad T-con board. The small board at the top center of the TV. If you want to give it a try? Buy a used one,so you don't loose that much money. If is the screen? Some people have had luck complaining to Samsung about it. They may provide a replacement screen,but you still have to pay a shop to install it. The T-Con board part number is... Samsung LJ94-02601F or this one depending on what screen is in yours. Samsung LJ94-02349C