Help with Samsung Un46eh5300. No picture. Backlight on

[Morocck119]

Hello all, this is my first thread and honestly I'm stumped on this TV repair. I picked it up for cheap because the owner said there was no picture (looks like the set has never been opened previously) so I dug in and to my surprise the TCON board had a blown IC chip in it. So I though "ah there's the problem" so I ordered a replacement and plugged it in annnd I still have no picture. The back lights stay on and I can hear the menu. So I did some more research and found that my EEPROM chip may need reset due to the blown IC but I cannot find the EEPROM despite searching Google for two days. My main board model is BN94-O5750Q. I really do appreciate any and all help. Thank you

[budm]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

Which IC on the T-CON board that is blown?
How about the pictures of the boards and the whole back side of the TV?
I have never heard of EEPROM of the main board has to be reset due to blown IC on the T-CON board.

[Morocck119]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

The EEPROM is on the TCON board? Here's some pictures of the boards. Included two pictures of the bad TCON

Edit: the blown IC has this written on it :17939A...H32090R.

[budm]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

"The EEPROM is on the TCON board? Here's some pictures of the boards. Included two pictures of the bad TCON" I do not know since you said the EEPROM needs to be reset, I would assume the EEPROM on the main board. Where did you get that info from?

[budm]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

So you install the new T-CON board? Is it a KNOWN GOOD board?

[Morocck119]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

It was pulled from a unit that had a cracked screen. And it came in antistatic packaging so it should be okay.
The seller says the board has been tested and works

[Hamie]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

They all say "the board has been tested and it works". Most of the time this is complete bull.
You'll need to check the t-con voltages.
Firstly the fuse, does it get 12v on either end of it?

If it does check AVDD test point and see if it gets roughy 15v

[Hamie]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

Finally if the fuse is open! DONT JUMP IT! Or you'll damage your panel.

[Morocck119]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

Okay fuse show continuity and when powered on its at 12.8 volts. Looking for the AVDD now

Edit: there seems to be a really faint clicking by the tcon board I can't pinpoint exactly where its coming from on the board in fear of the side of my fave meeting 12v lol

[Morocck119]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

Ahhhh, found where the clicking is coming from.....doesn't look too good :/

Looks like this caused the IC on TCON to pop...maybe try and clean it off with rubbing alcohol and see what I can do.

[Hamie]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

That not good, the panel is gone I'm afraid.

[Morocck119]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

Yea, well thank you both for helping me with this. I'll try the rubbing alcohol route as a last resort but it is looking grim. I'll post if anything changes or if I have another TV I'm attempting to fix and I'm stuck. (Next one is a RPTV convergence issue in a week or so)

[CapLeaker]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

someone cleaned the screen and the water ran down. not good!

[Jmcmunn]

Re: Help with Samsung Un46eh5300. No picture. Backlight on

Hi,I'm also new to forum.i have the same problem,no picture but have sound.i took the back off and see the panels,but do not see anything out of the ordinary,,,where should I start?thanks