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1 year old samsung 50b550 1080p 50inch plasma...working fine one minute then screen went black, audio is ok. menus do not come up either. audio changes with channels ok. Have back off, capacitors look ok, ceramic fuses are ok, dont see any burnt spots on boards. could someone please help me with troubleshooting this problem?

Posted by johnwendell3 on

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Sometime Mechanic

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  • 122 Answers

Samsung has three board. The power board is the one on the right and is where the 120 volts plugin. There should be only one capacitor rated at 100 uf at 450 volts. Measure this voltage - should be 390 volts. If not, change this capacitor to 350 uf with a rating of at least 400 volts (to 450 volts). I was lucky to have a old microwave and a old power supply laying around the house. I have a 120 uf and 220 uf both rated at 400 volts, and when I connected them in parallel (370 uf) and changed out the old one. The TV works fine now.

Posted on Nov 24, 2017

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Anonymous

  • 124 Answers

SOURCE: Samsung plasma all black screen

Black Screen come from three areas. 1- Power Supply Board 2- Inverter Board 3- Processing Board on the LCD. Since the Power Supply Board was replace, it easy to troubleshoot where the problem. lies If you cannot get the backlight, then its the inverter board. If you can use a flash light on the TV screen and can barely see the images, then the problem is indeed the inverter board. If you cannot see any images when using a flash light, then the problem comes from the LCD processing board. Let me know if you have any success. Mike

Posted on Feb 21, 2009

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Anonymous

  • 1 Answer

SOURCE: 50" Samsung Plasma with black screen

I had the same problem and had the TV serviced and found that the y board was blown $350 total. The repair guy explained that the board has a hot transister underneath that slowly leaked onto the board, but says that they can not get Samsung to admit to the problem. Works fine now but only have a 90 day warrenty on the parts.

Posted on Jul 01, 2009

Anonymous

  • 1077 Answers

SOURCE: i have a 50inch plasma tv green light go on for a

You must have some electronic experience when you replaced the bad capacitors.
Best thing to do is find a Service Manual for your TV on the internet. It will really help you in a big way to diagnose the source of the problem. The Service Manual will give you red light blinking codes, circuit diagrams, test points, and part# lists.Usually, cost under $20.
Another thing you might want to look at is the power supply for the screen. Most manufactures call it a Backlight Inverter Board. The TV maybe trying to power up the screen and failed. Then, when into protection mode. The Service Manual should define the red light blinking code for you.

I hope I shed some light on the subject for you.

Posted on Jul 14, 2009

Anonymous

  • 458 Answers

SOURCE: Samsung plasma. adding channels to favorites.

open tv manual setup cable to ant
auto scan channels

Posted on Aug 13, 2009

roety

Eric Rotmil

  • 587 Answers

SOURCE: My 50'' Samsung Plasma has dead screen after only 2 years

Hi,
welcome to fixya!
without doing voltage checks, my best guess is this:

Plasma hpr5053 or hps5053 models will burn out a buffer board or both, there are two buffers and the Y board.
I usually change all 3 at once, but if on a budget you can try to remove one buffer and see if you get half picture (upper or lower)
this is something only a technician should attempt. the boards cost $200 each (buffers)
$300-$400 (Y board).
if you actually get half a picture the Y and one buffer are good, a bad buffer usually burns out the Y board. and in really bad cases the panel is bad also (not common, but possible)
For part#s , specific help you can post a model# , but again this is a repairmans job not something the average customer can fix.
hope this helps
Eric

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

Posted on Aug 27, 2009

Testimonial: "thank you sounds greek to me and costly but I guess I have to do what I have to do-----have you ever heard of a video IC board?"

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