Samsung UN65MU6500FXZA won't turn on

[brucetv]

Re: Samsung UN65MU6500FXZA won't turn on

I remember there was a shortage of MLCC's during that production time so I'm sure they stuck some crap MLCC's in there just to get production out. Also explains why there are 3 green lower tab boards and one blue. Really blows for loyal Samsung fans. Please put the Tcon board back in your Tv's Samsung! Jeez. The whole model sucks with it's cheap snap in plastic bezel that is the ONLY thing holding the panel in. Sucks. The CEO's of Samsung should return their end of the year bonus's for spewing out crap like this out of their Mexican plant.

[budm]

Re: Samsung UN65MU6500FXZA won't turn on

LCD panel Made in Mexico? I did not expect that.

[brucetv]

Re: Samsung UN65MU6500FXZA won't turn on

Yes Bud...more crap from Samsung in their quest to do away without a Tcon board it's taking these caps out prematurely. Samsung panel for sure....here's the panel number. It's a pain in the ass repair and we are so busy we don't even do them anymore for fear another one will go out.

[budm]

Re: Samsung UN65MU6500FXZA won't turn on

More failed MLCC.
Is that SAMSUNG LCD panel, or other OEM?

[brucetv]

Re: Samsung UN65MU6500FXZA won't turn on

We are seeing a lot of these coming in with a short in the lower driver board. It's tedious to go through the caps removing them one by one to find the short but it's doable. If your Tv backlights and optical on main board are turning on and off unplug the Tv and remove on ribbon cable going to the panel one at a time. If the backlights and optical stays on then the short is on that side you have disconnected. You have to remove the speaker and the lower driver board cover and test those itty bitty caps. Solder tweezers really come in handy for this job. You can also isolate it since each side has two bottom boards by disconnecting the U shaped ribbon. I am seeing most coming in with 3 green and one blue and the short was always on the blue. It's almost like Samsung had a "Houston, we have a problem here" and shoved a piece of crap board in there just to get by. It's marked BN96-39042A Once you unhook that oddball blue driver board the backlights and Tv stays on fine in most cases if it's not the Main board. Check two caps next to CK2 and CK3 on that blue board. We now save the lower driver boards on damaged panel tv's to get the good caps off them for future repairs. I also tell all my customers to avoid this model like the Covid19 virus because this is happening on 2 year old Samsung's and that's not worth the money SAMSUNG! Samsung engineering>

[nomoresonys]

Re: Samsung UN65MU6500FXZA won't turn on

Glad to hear it, thanks for follow-up report.

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on EDIT FIXED

Just wanted to update the repair on the TV and thanks to

brandontvparts on Ebay

he gave me the best price on the main board and shipping was super fast.

the TV is up and running. Thanks to everyone that helped, you guys are the best and Ill be back on the next one, in the mean time I'll be here reading and learning.

thanks Mark

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on

Thanks for the reassurance. I’ll get a main board and post back.
Thanks Mark

[R_J]

Re: Samsung UN65MU6500FXZA won't turn on

I would not be concerned, It is very likely the board is marked wrong. If you look next to that voltage mark it says A13v:12.8V which is the same point

[CapLeaker]

Re: Samsung UN65MU6500FXZA won't turn on

I we would be concerned about that, you would know that already.

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on

Ok, then that power supply is working like it should.

Hey R_J, should I be concerned the voltages are higher
2V for standby
1V for on
Thanks
Mark

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on

Aw man, LOL, you thanks for helping.
and thanks R_J and CapLeaker as well.

[nomoresonys]

Re: Samsung UN65MU6500FXZA won't turn on

Ah sweet. I will shop for either one
Thanks nomoresonys!!
Mark

That IS the one you need, done this many many time, I would not steer you wrong.

[nomoresonys]

Re: Samsung UN65MU6500FXZA won't turn on

Hey thanks nomoresonys. There are lots in EBay the one you found isn’t the same one my TV has but I appreciate you spending the time looking.
I just was wanting some guidance on diagnosing. Sounds like a main board problem. Here is the one from my TV

.

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on

Ah sweet. I will shop for either one
Thanks nomoresonys!!
Mark

[nomoresonys]

Re: Samsung UN65MU6500FXZA won't turn on

BN94-12428A and BN94-11709A will both work.

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on

Hey thanks nomoresonys. There are lots in EBay the one you found isn't the same one my TV has but I appreciate you spending the time looking.
I just was wanting some guidance on diagnosing. Sounds like a main board problem. Here is the one from my TV

[nomoresonys]

Re: Samsung UN65MU6500FXZA won't turn on

This might be it, try to match the BNxxx numbers on the white sticker on your mainboard or just contact them with your board details, they can tell you if it's a match: https://www.ebay.com/itm/Samsung-65-...oAAOSwKs1dUfd6

[Rotorcraft230]

Re: Samsung UN65MU6500FXZA won't turn on

I just want to confirm which board is bad before I buy one.
Mark

[R_J]

Re: Samsung UN65MU6500FXZA won't turn on

Ok, then that power supply is working like it should.