Samsung UN55KU6300FXZA

[nomoresonys]

Re: Samsung UN55KU6300FXZA

I did it with an un55h6350, had to modify one connector, lengthen a speaker wire and cut out a bit of the back cover, didn't have to change anything in service menu.

[lotas]

Re: Samsung UN55KU6300FXZA

Thanks. I ordered one!

There will be no image or it will be very distorted, since you ordered a board for a 40 inch model, and you have 55.
T-CON is built into the motherboard and the firmware in it is for a specific matrix.

[distearth]

Re: Samsung UN55KU6300FXZA

I wouldn't be surprised if the first or second worked for you, you could contact them and ask if they know: https://www.shopjimmy.com/search.php...UN40KU6290FXZA

Thanks. I ordered one!

[nomoresonys]

Re: Samsung UN55KU6300FXZA

I wouldn't be surprised if the first or second worked for you, you could contact them and ask if they know: https://www.shopjimmy.com/search.php...UN40KU6290FXZA

[nomoresonys]

Re: Samsung UN55KU6300FXZA

.

[nomoresonys]

Re: Samsung UN55KU6300FXZA

look again, version number may be under the model code on the back cover, what are both, full model code and version number? if available.

[distearth]

Re: Samsung UN55KU6300FXZA

TV Model is UN55KU6290

[nomoresonys]

Re: Samsung UN55KU6300FXZA

whats the version number found on back cover of tv?

[distearth]

Re: Samsung UN55KU6300FXZA

My main board is BN94-10651G. Power board is good. I'm having trouble finding this exact one. Do other models work? I don't care if I lose a port or something.

[Davi.p]

Re: Samsung UN55KU6300FXZA

How many blinks? which are the readings on the leds outputs with main board disconnected? if you pull out the Fail count contact from the psb>mb cable with the help of a mini flat screwdriver and you try boot up tv what happens? in an other manner, all things connected, try pressing exit key on RC for at least 15sec., last try, try enter service menu..

[kiko1]

Re: Samsung UN55KU6300FXZA

Did the new board fix it? I'm having a similar issue. Backlight comes on when main board is not connected.

I have a same problem....
ordered new PS and same problem.
There are 2 separate circuits of backlight, one on mine not working...Is it possible that this set will not power up with half of BL open (blinking red LED like in the beginning of thread)??

anyone?

[Davi.p]

Re: Samsung UN55KU6300FXZA

I don't think you have the same readings with the B.L. working..

[nomoresonys]

Re: Samsung UN55KU6300FXZA

Did the new board fix it? I'm having a similar issue. Backlight comes on when main board is not connected.

Backlight on and steady with mainboard unhooked, this means backlights and powerboard are ok.

[distearth]

Re: Samsung UN55KU6300FXZA

Hamie... I have a board doing exactly as described in this thread. Voltages all the same. I did check the diode you suggested. Mine tested ok. I ordered a new board so I guess we'll see.

Did the new board fix it? I'm having a similar issue. Backlight comes on when main board is not connected.

[Ef8hemi]

Re: Samsung UN55KU6300FXZA

Hamie... I have a board doing exactly as described in this thread. Voltages all the same. I did check the diode you suggested. Mine tested ok. I ordered a new board so I guess we'll see.

[Hamie]

Re: Samsung UN55KU6300FXZA

I didn't realise this was an old thread as it was bumped.
Be interesting if you still have the old board to test the part though.

[iliketofixstuff]

Re: Samsung UN55KU6300FXZA

Normally I wouldn't reply to an old thread but it's already resurrected.

I ended up guessing and buying a replacement power supply board online and that did the trick. TV has been working fine for the last year or so. I didn't really dig into the design of the board but I could see even on a DMM that the voltages weren't stable so that seemed like a good guess.

Appreciate everyone's help on this. I totally would have tested/changed out the diode at the time if I had this info. Thanks all!

[Hamie]

Re: Samsung UN55KU6300FXZA

https://www.badcaps.net/forum/showthread.php?t=90116

Please test that diode in the above thread.

[Hamie]

Re: Samsung UN55KU6300FXZA

I created a thread on repairing this power supply not so long ago. I think you may have the same problem.

Unsteady output voltages is usually caused by one of the smd diodes failing

[jermelonzo]

Re: Samsung UN55KU6300FXZA

If everything on the PSU is checking out OK. Then I'd start looking at the mainboard. There are often times when the EEPROM gets corrupted and needs replacing. The EEPROM is where read-only firmware is held. I've attached an image of a common Samsung EEPROM IC. See if shopjimmy sells replacements and solder it in.

Hope this helps!