My samsung 65 7150 seemed to have a bad main board. So I ordered a used one and replaced it. Now the LED lights up but niether there is a picture nor does the button work any more...

SOURCE: Samsung DLP HL-S5087W 56" Confused...

I would suggest to remove the lamp again and visual check the filament or you can also use a multimeter and check for continuity or low resistance. If you have low resistance or continuity when you measure it, It means the lamp still good.
I would contact the lamp vendor and let them know that the lamp failed. I think they gave some warranty on the lamp.
Let me know if you need further assistance.

SOURCE: I have a Samsung 56"

Actually the Samsung model you have was the first model to come out in 2006 that did not have a color wheel. The LED blinking is actually a self diagnostic program of sorts. Depending on which lights are blinking, and how often, the service manual will tell you where you should start checking or replacing parts and assemblies. I do have most of the codes, so can you tell me if the if the LED light is the only one flashing, how long it flashes, and do any other lights flash at all? Thank you.

SOURCE: Why won't my Samsung UN40D5005BF come on?

Lightning damage can do a # on LCD TV's. I've seen cases where it took out power supplies and main boards at the same time. I'm not one who likes to use the "shot gun" approach. You would need to get the set professionally diagnosed in my opinion. Where did you get the main board from?? Are you sure it is a working board?

SOURCE: I have a samsung lnt4066 led TV with a distorted picture. I have replaced the main board, power supply and the t con board with no success. I have pictures of what the TV is doing and would like to sh

You either have a bad t-con board or the screen is bad. Check to make sure all the ribbon cables are seated fully and connected. Even replacement parts can be bad sometimes, new and used both.

The Knight

• 76851 Answers
• Posted on Oct 22, 2015

SOURCE: Samsung UN50H6203AF 50" led tv sounds works but no picture. Backlights light up when I turn it on so I replaced the t con board but still no picture. What's the next step?

The display panel should be suspected. The picture you attached here looks so. Contact the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/