Question about Samsung UN39FH5000FXZA - 39in 1080p 240 Cmr Led Fh5000 Series
Have a Samsung UN39FH5000 LED TV (a refurb that's out of warranty). Last week the screen went out....still hearing audio, but the screen is completely black. Neither the "welcome" screen, nor any menus are visible. Just a black screen. Opened the back and inspected the components on the three visible PC Boards. All looked OK including the capacitors. Bought three replacement boards anyway on eBay for $36 total and installed them. Nothing changed....TV turns on but the screen remains black. Any ideas before I put the TV out as trash?
This is the common problem for this model, that the TV powered up, has sound, but no display.
1. Open the back cover & turn the TV on, if the back lights is not on, please check the voltage on CNL802 on power supply board, it should be 140V DC (Between the blue & black wire),
A. if the voltage is there, it indicates the LED strip inside the panel is defective, you have to replace the LED assy to fix it.
B. If the voltage is not there or low, then measure the voltage on Pin 1 & 5 on CNM805, the voltage should be 12-13V DC, if the voltage is right, the power supply is bad, replace it.
C. If one of the voltage is low, or not presents, replace the main board.
2. If the back lights is on, but no display,
A. Please check the fuse FP1 on the T-CON board, if it is open, replace the T-CON board.
B. If the the fuse is OK, please replace the main board.
C. We do have some special instances that the main board & T-CON board is OK, but the LCD panel buffer board has problem , if this is the circumstance, your TV is not worth to repair.
If you have any more question, fell free call me at (541)683-8887.
I hope that this would help you.
Posted on Feb 03, 2016
Did you end up repairing your Samsung ? I am having issues. replaced 3 boards, and my result is blue flashing, ans flashing display. No sound, no video.
Posted on Oct 14, 2015
Hi, My name is Wayne and I own Affordable Mobile TV Repair in Va Beach Va. If you have any soldering skills, you can repair the LED strips. The easiest way to do this is to take your multimeter and check the resistance across each led. In one direction the led will light up slightly. In the other direction, the LED will not light. That will show that the LED is working. LEDs either short or open. If they short, they need to be removed. If they are open you can just solder leeds over the open LED and attach additional LEDs as necessary. For additional information, please go to AffordableMobileTVRepair.com and submit a service request for FREE technical information. thanks
Posted on Apr 21, 2015
Hey, John, did you ever find a solution to this problem with the Samsung LC TV. I have exactly the same problem and all three boards did not fix the problem. I have the whole TV apart now down to the led strips and am clueless. Wondering if you found the problem.
Posted on Mar 25, 2015
Testimonial: "In fact, no. At this point it's an academic exercise for me! I have the TV apart as well, down to the LED strips. Sourced them on eBay but I'm finding that -- unlike the boards -- the LED strips are not returnable. Will be testing the LED strips at a friend's house. He has a variable power supply and we'll see if the LED strips are good. But I can say that none look burnt. At the time my friend was over and he checked the cold-side voltages (on the old power board that's now reinstalled) going to each LED strip and they all seem to be within spec. Will report back on my progress"
Can you see a faint picture when looking up close to the screen? If so this could be the screen inverter that lights up the screen that has gone!
Posted on Dec 14, 2014
Testimonial: "Thanks for the reply, Mikey, but I don't see a faint image. I'm in the process of returning the three boards I bought on eBay. As a last resort I ordered the cable set for this TV on eBay ($12 including shipping). I'll swap out the cables one by one to see if anything changes. Who knows.....the solution might be that simple!! Will report back after I get them and test."
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Posted on Jan 02, 2017
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