Samsung UN60EH600 UN55EH6000 Identical Problem

[Michale32086]

I just got in a couple nice Samsungs.. Same series, one's a 55" one's a 60"

The both will give a backlight but nothing on the display panel..

I have replaced the Main Board on the 55 but no luck. I have a new TCON board coming..

But on the 60", there is an added twist..

The Power PCB had 2 blown caps (marked in red) plus a couple blackend charred areas... While pulling out the old caps, I kinda cracked the pcb, but the crack doesn't appear to have gone all the way thru the board..

I have had instances where a bad power PCB would produce the kind of symptom I am seeing, but it's somewhat unusual.. Usually when I get a back light but no display it's usually a TCON/MAIN issue..

Any suggestions on how to confirm??

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

Another weird thing is, when the TV is turned off, but plugged in, I pull the marked connector and the backlights come on...

That would seem to indicate some kind of short in the Power PCB???

[freakaftr8]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

No that's not weird at all. These TV power supplies are designed with pull up resistors so the back lights will come on when you disconnect connector that goes from the power supply to the main board.

I would check the usual stuff like 12v to the tcon board and removing one panel output ribbon cable at a time

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

No that's not weird at all. These TV power supplies are designed with pull up resistors so the back lights will come on when you disconnect connector that goes from the power supply to the main board.

OK.. I guess I just never pulled a connector off like that before..

I would check the usual stuff like 12v to the tcon board and removing one panel output ribbon cable at a time

Yea, I tried the ribbon cable thing.. I get a universal black screen regardless of which cable is pulled. No change in either side of the screen...

Check 12V off the fuse???

[freakaftr8]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

Yes check 12v of both sides make sure it's not blown.. Like if there's 12 V coming in make sure this 12 V going out of the fuse.

The good news is the panel sound OK so far since removing one ribbon cable still provided a black picture

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

With the NEG Probe on chassis GND, I get -12.65V on either side of the TCON fuse...

[Th3_uN1Qu3]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

You have your multimeter probes swapped. Anyway, your readings show the Tcon fuse is good.

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

You have your multimeter probes swapped. Anyway, your readings show the Tcon fuse is good.

Really???

[vinceroger69]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

black in middle red on right i think

[nomoresonys]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

My black lead is in com.

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

I'm a idjut...

Thanx...

That explains a lot of weird readings I got lately..

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

I used to think I was a talented amateur...

Now I know I am just an amateur..

[vinceroger69]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

we all make the odd mistake i blame my age lol

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

OK 12.66V on both sides of the TCON fuse..

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

we all make the odd mistake i blame my age lol

Works for me..

[freakaftr8]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

Hard to tell. These are known for tcon failures with the THINE PWM IC.

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

So, it's a pretty safe bet that the TCON is bad???

[nomoresonys]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

I used to think I was a talented amateur...

Now I know I am just an amateur..

I'm in the same club, my short term memory took a permanent vacation, whatever I learn today will surely be forgotten tomorrow.

[martino]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

So, it's a pretty safe bet that the TCON is bad???

https://www.youtube.com/watch?v=iuHrnvAKlGw

[Michale32086]

Re: Samsung UN60EH600 UN55EH6000 Identical Problem

I'm in the same club, my short term memory took a permanent vacation, whatever I learn today will surely be forgotten tomorrow.

Ahhh Kelly Bundy Syndrome

Brutal....