Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

[Michale32086]

Seems to be my day for Sammy Plasmas...

60" Plasma... I don't have my phone, so I can't get pics til Tuesday.....

"Tractor beam??? Won't be installed til Tuesday"
-Captain Harriman, STAR TREK VII, GENERATIONS



Anyways, at plug in the red power LED comes on... Push ON and it fades on and off, then goes blue... After 30 secs or so it fades to off.. Push a button (Volume, Channel, Menu, etc etc) it blinks blue.. All normal..

No display...

Voltages are good across the board...

I am leaning towards a bad Z-Sus.....

Just wanted to get a general idea to play with....

[Wilderone]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Or Mainboard...I have had quite a few that were just main IC BGA reflow problems.
Just bake or reflow the main chip anyway & see if it brings it to life.
Mostly I have found there is a slight glow to the panel in a dark room & that has been Mainboard.

[R_J]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Have you checked the other posts like this one https://www.badcaps.net/forum/showthread.php?t=33454

[Michale32086]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Or Mainboard...I have had quite a few that were just main IC BGA reflow problems.
Just bake or reflow the main chip anyway & see if it brings it to life.
Mostly I have found there is a slight glow to the panel in a dark room & that has been Mainboard.

I did a reflow on the Main board...

Now what happens is I power up the TV, red LED power light comes on.. I push the power button, relay clicks, red LED turns blue and then the TV shuts down and the blue LED goes to red...

I have a sinking feeling I fried the Main board.

[Michale32086]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Have you checked the other posts like this one https://www.badcaps.net/forum/showthread.php?t=33454

Yea, I read thru some other threads on the Sammy Plasma, but none really seemed the same as my problem..

And now I have a different problem.

[ReeceyBurger123]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

ffs

[Michale32086]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

ffs

OK, I'll bite... FFS??

[tvtimmy]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

60pk750 is your model number? Take a look at the bottom of the front of the tv. Does it say Sammy or LG?

[Michale32086]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

It's entirely possible I mis-read that..

I'll have to check in the morning.. Thanx..

[Andrew F. Ali]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Yes. It would be a LG TV. But I think you might have a Y-Sus Bd. issue.

[Michale32086]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Yep, an LG... Color me embarrassed...

I found a couple LG MAIN boards that have the same LVDS connector and the same size Power PCB connector..

I hooked it up and the TV came on! The display blinked on and off but it did come on.. I am hoping that it's just because it's an incompatible Main board, but you might be right Andrew.. The Y-SUS might be bad as well.. There is nothing obvious.. No burns or blows, so I am hoping it's just a Main Board issue. Gonna tear into my parts area to see if I can find one..

[Andrew F. Ali]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Test the suspect Main Bd. on the other working TV, if that is possible to confirm faulty Main Bd.

[Michale32086]

Re: Sammy 60PK750 Plasma No Pic, No Sound, Voltages Good..

Test the suspect Main Bd. on the other working TV, if that is possible to confirm faulty Main Bd.

Hmmmmm Good idea Lemme see if I can dig up a similar model LG...

Awesome idea.. Thanx