Samsung UN60EH6050F Sound-no picture

[Chris24]

Hello,

I have a Samsung LED UN60EH6050 that is producing sound but no picture. The panel is glowing a tinted black/grey, and flickers when changing channels etc. The TV was working perfectly, turned it off for dinner, turned it on later that night with the symptoms. No pop or clicking sound-and otherwise it operates normal, only now it glows dark with no picture.

TV is 4 months out of warranty so Samsung offered to cover "parts," however local technician wants to charge flat rate repair $205 (all labor).

Before I rip open the back and start testing things, wanted to get your ideas on possible fault (Tcon, main board, panel) and whether I should just go with local tech. I have an inexpensive meter, and I repaired a Phillips 42" plasma about 3 years ago (first timer). My fear is if it is the panel, the tech says the flat rate is out the window. Perhaps if I figured out what was wrong, Samsung could just send me the parts....

Thanks for looking, and I will post pics of boards etc. once we decide if that is the route to go.

[mmartell]

Re: Samsung UN60EH6050F Sound-no picture

You say no picture - have you looked up real close to the panel to see if there is actually something there ? You can shine a flashlight on it, might help.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

I got real close in the dark and couldn't make anything out. Only the glow and the glow is only altered by changing channels/source there is a slit flicker in glow intensity during change.

Will try flashlight and get back to you.

[truep]

Re: Samsung UN60EH6050F Sound-no picture

It does sound like the TCON or TCON fuse.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Checked the screen in the dark with a flash light, no images. Consistent glow.

Opened the back and checked for bulging caps, loose connections etc. All seems good. Kinda felt like the Tcon top connection was lose, but reconnecting it did nothing. You can see it in the "Tcon close" image.

When you guys say "clean the connections" what do you recommend? Canned Air? Some type of wipe? I do have a fireplace in the same room so figured I would try that too.

Posting the pictures now that I think I'll go forward with checking it myself. Also threw in my cheap multimeter so you know what I'm working with here. Definitely a rookie.

Thanks for any advice or best guess if you think it could be the panel.

[budm]

Re: Samsung UN60EH6050F Sound-no picture

OK, just be sure, you can see the screen glow when look at the back of the panel or ont he front, just no pictures on the screen, if that is the case, you then need to check the DC voltage on both ends of the SMD fuse on the T-CON board. It is the board under the metal shield that you can see one black flat cable connected to and two brown flat cables connected to the opposite side of the board.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Thanks for the reply budm,

I can see the glow on the front of the screen and checked the front with a flashlight, in the dark, but didn't see images. The back also had light coming from it.

Is the fuse labeled FJ01, rectangular, and just below the main connection to the right?

Do I test it powered on/plugged in or off/not plugged in?

Thanks!

[budm]

Re: Samsung UN60EH6050F Sound-no picture

"Is the fuse labeled FJ01, rectangular, and just below the main connection to the right?" I see F301 white rectangular fuse to the right of the connector.
You can check with Ohm meter first, TV not plugged in.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Roger- F301

my mistake

on/off?

[budm]

Re: Samsung UN60EH6050F Sound-no picture

TV turned on, black probe on the chassis, red probe on the ends of the fuse. It should be either 5VDC or 12VDC depends on panel design.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Thanks again bud, sorry for delay.

On SMD fuse I got 12VDC on both ends, and 0 for ohm test and a beep for continuity.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Since the fuse checks out ok, any thoughts on what this rules out or at least confirms it could not be?

I found a Tcon on ebay, but am concerned it may not be the Tcon now?

[budm]

Re: Samsung UN60EH6050F Sound-no picture

OK, so the T-con is getting the power to it. On the T-CON board I can see about 4 3-pin devices (2 small, 2 large one) which are voltage regulators I believe. You need to take the reading and the P/N on each one of those devices.
Report the reading according to the thread here:
https://www.badcaps.net/forum/showth...999#post300999

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Here are the results from testing the four voltage regulators you specified. Thanks for the link to the guide. I numbered the regulators from top to bottom, right to left based on distance from LVDS. The 2 large ones are #1 and 2, and the small ones are #3 and 4 (right to left). I included a close up picture of each in case I misread the lines, and a clearer Tcon picture (although still not great). Since a lot of the readings are 0.00, I rechecked multiple times to be sure. Also rechecked the main SMD fuse when I was done and it was 12.74 both sides still.

#1
11172
1219CG
pin 1 = 0.56
pin 2 (stub) = 1.82
pin 3 = 3.3

#2
405
221
pin 1 = 0.00
pin 2 (stub) = 12.74
pin 3 = 0.00

#3
81
217
pin 1 = 0.00
pin 2 = 0.00
pin 3 = 0.00

#4
82
208
pin 1 = 0.00
pin 2 = 12.74
pin 3 = 0.00

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

Do you think with the 0.00 readings it's safe to say tcon board is bad?

[budm]

Re: Samsung UN60EH6050F Sound-no picture

The 2, 3, and 4 P/N do not looks like the P/N for the regulator IC, not sure what they are. #1 has correct reading.

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

A search for "STC 405 datasheet" (#2) brings up a sheet for a transistor. Could the others be transistors and would they typically read 0.00.

Anywhere else I could check ?

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

New Tcon arrived in the mail and SUCCESS! TV works great now.

Thank you bud for your assistance, and to everyone that contributes on the forum. I've enjoyed reading the guides, watching Tom's videos, and getting smarter about electronic repair while worrying about how to fix my tv. It's a great forum...

Take Care

[budm]

Re: Samsung UN60EH6050F Sound-no picture

Glad to hear the successful repair. Was the T-CON expensive?

[Chris24]

Re: Samsung UN60EH6050F Sound-no picture

It was $35 w/ shipping on ebay. The guy had 99.5 review and shopjimmy was sold out so I pulled the trigger. Says it was pulled from a broken screen tv so let's hope it holds up.