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Ask Dan Your Own Question

Dan
Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 6965
Experience:  USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
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i have a samsung LTJ460HW01-B 3D TV I hear sound but no picture

Customer Question

i have a samsung LTJ460HW01-B 3D TV I hear sound but no picture what would be the problem and what board do i need to fix it?
Thank Tou for your time
Steve
Submitted: 1 year ago.
Category: TV
Expert:  Dan replied 1 year ago.

Dan :

Thanks for the question. I'm Dan.

Dan :

Let me know when you're in the chat.

Customer:

good morining. im here

Dan :

Good morning!

Dan :

Welcome.

Dan :

OK, I'm just reading over your question.

Dan :

OK, it looks like the model number you posted is for the display panel, and not the TV itself.

Dan :

What's the model code for the TV?

Customer:

ok give me a minute

Dan :

Sure.

Customer:

Would this be it UN46D6420UF or model code UN46D6420UFXZA

Dan :

Either of those would work.

Dan :

Thanks.

Dan :

OK, I need you to make the room as dark as possible.

Dan :

And turn the TV on.

Dan :

Does the screen have a very dark and faint glow coming from the screen?

Dan :

It might look like the night sky.

Dan :

As opposed to totally pitch black.

Customer:

that might take a couple minutes the tv is basically ripped apart

Dan :

OK, no problem. I'll be here. Also when you have it on, please use the original remote and see if you can get a menu. Also try changing the volume and see if the volume bar shows up on screen.

Dan :

No rush.

Customer:

i turned on and it is just a touch brighter than when the power is off.not much though

Dan :

OK, good work.

Customer:

no volume bar

Customer:

no menu

Dan :

OK. We're looking at a bad TCON or bad main board.

Dan :

Leave the TV on.

Dan :

The main board is the big green one.

Dan :

The TCON is under a rectangular metal shield, down at the bottom.

Dan :

See them?

Customer:

yes. small board at the bottom in middle right?

Dan :

Yep, that's your TCON.

Dan :

OK it's going to be one of those two. There are a couple tests we can use to narrow it down.

Dan :

Turn the TV off, but leave it plugged in.

Dan :

Now use the original remote and press MUTE 1 8 2 POWER.

Dan :

Tell me if the service menu pops up.

Customer:

nothing

Dan :

Hm. Try a couple more times to be sure. Make sure the TV is in "standby" mode... that's turned off but plugged in.

Customer:

still nothing

Dan :

OK go ahead and turn the TV back on.

Dan :

Now, see the ribbon cable going from the main board to the TCON? I think it's orange.

Customer:

yes although its black

Customer:

oh yea right i stand corrected

Dan :

OK. TV on.

Dan :

Have someone watch the screen very closely...

Dan :

As you disconnect that cable and reconnect it.

Dan :

You can do it with a mirror, if nobody else is there to help.

Dan :

But you need to look closely.

Dan :

Tell me if there's a little flicker on the screen when that cable is disconnected and reconnected.

Customer:

just trying to figure out how to take ribbon connector off

Dan :

It has 2 locks.

Dan :

Flip the white bar up (first lock)

Dan :

Then squeeze the tabs as you pull the cable out (second lock)

Customer:

i unplugged then plugged back in when plugged back in a flash on screen said "mode" and their was some writting. it went away quickly. just a flash

Dan :

Ah ha. Perfect.

Dan :

We've got a bad main board on our hands.

Dan :

If it was the TCON, we wouldn't have seen anything on the screen.

Dan :

That test isn't 100%, but it's as good as we can do in the field without fancy factory test equipment.

Dan :

I've used it hundreds of times with excellent results.

Customer:

great! what is the next step? can u tell me the part number of board? Where would i get one?

Dan :

Part numbers can vary. You'll want to pull the number from the board itself. I'll tell you what it should be...

Dan :

OK it should start with BN94 or BN91...

Dan :

Look for that number on the board.

Customer:

would it be the board on left or right?

Dan :

The big green one. Think it's on your left.

Dan :

Once you get that number, punch it into ShopJimmy.com

Dan :

They should have a used one. It will have a 6-month warranty, which is nice.

Customer:

i see BN94-05011K

Dan :

OK let me see what I can find.

Dan :

Hm tough board to find.

Dan :

ShopJimmy.com doesn't have any.

Dan :

There's one on eBay... risky.

Dan :

There's another one on TVserviceParts.com (OK site) but it's $180.

Dan :

It should be more around the $100 mark, but supply and demand I guess.

Dan :

If you're not in a rush, you can call the ShopJimmy guys and they can order / reserve one for you.

Customer:

ok. 180 is still better than replacing a tv that is 18 months old

Dan :

Yep, I agree with that.

Dan :

You always just punch the part number into Google, too.

Dan :

You can* always...

Customer:

it looks to me that what ive seen on the internet that samsung is getting a bad rep for these problems

Dan :

Eh. They're not bad. I actually have one in my living room.

Dan :

Everyone has their problems, really.

Dan :

Samsung has a huge market share, so you hear about them a little more.

Dan :

Anyway, replacing that board is pretty simple...

Dan :

Just disconnect the wiring harnesses, and remove the screws.

Dan :

Then fit the replacement, and reverse the procedure.

Dan :

No soldering or special tools.

Customer:

great i think i have what i need to proceed. thank you so much for your help. try to enjoy your saturday!

Dan :

My pleasure!

Dan :

To close the chat, just leave a positive rating on this conversation.

Dan :

You should see some smiley faces on your screen.

Dan, Master Tech and Repair Facility Trainer
Category: TV
Satisfied Customers: 6965
Experience: USAF trained; A.A.S Electronics; A.A.S. Education; Currently teaching advanced troubleshooting and repair for the DoD.
Dan and 2 other TV Specialists are ready to help you
Customer: replied 5 months ago.

We finally found that board and replaced it and the TV still doesn't work.


 


Can you give us another suggestion?

Customer: replied 5 months ago.
Relist: Incomplete answer.
Expert:  Shahid replied 5 months ago.
Hello, my name is Shahid, I'll be happy to assist you.

Sorry for delayed reply, requested expert is currently offline, please reply back if you still need assistance.

Thanks.

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