HDMI Inputs Have No Signal - Samsung UN65MU6290

[dumpstertv]

Hi all, I have a Samsung UN65MU6290 TV, and it works fine using its internal smart TV functions but I'm unable to get signal from any of the HDMI inputs. The optical audio out works, and there's one other component jack but I don't have the cables to test that. Checking the TV's diagnostics, the "HDMI SW IC" says "NG," so I assume the main board either needs to be repaired or replaced.

I saw some mail-in repair services, which I'm considering, but my main question is, if I choose to go the replacement route, do I need *exactly* the same board? There are a lot of seemingly identical variations of this board that are significantly cheaper on eBay and other sites, but the few exact model matches I've found are more expensive. (The board, or at least the main chip, model is BN94-12696B, made in October 2017.) If I got a replacement from a TV that's the same size, but slightly higher end, like a BN94-12696C or D, would the TV still function the same? Attached are photos of the TV self diagnostic and of the main board. Thank you!

[nomoresonys]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

Might work, what I would do is tell the seller what you are trying to do and if you can send it back if it is incompatible, one thing you have to watch out for, will the board your getting connectors match up and will the back cover fit with the input output holes lining up. Had that issue on my own tv but just cut the back cover plastic out so the inputs were not covered, ugly but I don't look back there very often.

[neilc6]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

Usually the last letter of a part number is the revision and a newer revision should be compatible for fit, form and function with older ones. That being said, I have seen a Samsung part with a different revision that was a completely different part so someone didn't follow the standard and it slipped through when it should have been a different part number.

[lotas]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

If your native one is BN94-12696B, then you should replace it with BN94-12696B with the letter "B", with another letter "C" or "D" there may be incompatibility of the panel itself (matrix).

[CapLeaker]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

For shits and giggles remove that metal shield. Follow the traces from the hdmi ports and they probably will go to the hdmi switch ic.

[dumpstertv]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

Thank you all! I'm getting mixed advice but I guess the safest route is to either send in for repair or buy the exact same version of board. I will say that the C and D revisions of the board are visually pretty indistinguishable to me, I attached an image of a D board on eBay with mine on the left and the ports/components all appear to be in the same spots. I guess the issue lies in the compatibility with the specific panel. I also removed the shielding and found that the HDMI traces all lead back to the main CPU. Does this seem like an internal failure of the chip or something that heating the traces could solve?

[nomoresonys]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

Try freezing up IC901 with some freezespray, get it good and cold, then try the hdmi, see if it works for a bit, could also try a factory reset if you didn't already and a firmware update, might not work but it's fixed things before.

[CapLeaker]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

It’s not looking good…

[F1Guy123]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

Hi all, I have a Samsung UN65MU6290 TV, and it works fine using its internal smart TV functions but I'm unable to get signal from any of the HDMI inputs. The optical audio out works, and there's one other component jack but I don't have the cables to test that. Checking the TV's diagnostics, the "HDMI SW IC" says "NG," so I assume the main board either needs to be repaired or replaced.

I saw some mail-in repair services, which I'm considering, but my main question is, if I choose to go the replacement route, do I need *exactly* the same board? There are a lot of seemingly identical variations of this board that are significantly cheaper on eBay and other sites, but the few exact model matches I've found are more expensive. (The board, or at least the main chip, model is BN94-12696B, made in October 2017.) If I got a replacement from a TV that's the same size, but slightly higher end, like a BN94-12696C or D, would the TV still function the same? Attached are photos of the TV self diagnostic and of the main board. Thank you!

Hello,
I have the same problem with my Samsung 65in. It is the UN65F8000.
I want to replace the board in mine as well but I need to find the exact Samsung part number. How did you locate it for your TV?

Is there a definitive service parts list for each model or website you used? Obviously the key to this is finding the proper part number and then finding a seller with one.

Where did you buy your replacement from? I see a lot of used junk (maybe) out there so I'm weary about buying the board from just anyone.

Whatever info you found in your journey on this regarding how to get the exact part number for the model TV and where you found the part, or install tips would help a lot.

Thank you for posting!

[CapLeaker]

Re: HDMI Inputs Have No Signal - Samsung UN65MU6290

There is a part number on a sticker on each board starting BN94… that’s the number you need. Put that into Shopjimmy.com and Bob is your uncle.
https://www.shopjimmy.com/search.php...uery=UN65F8000
Unfortunately there are out of stock there.