TV Samsung UE55HU8500L (2014) – service menu + firmware reflashing advice needed

[Robby-Gr]

Hi all,

I’m trying to recover a Samsung UE55HU8500L (curved UHD, 4K model from 2014) after replacing the panel. The new panel is a 55A1UU8EH, which produces excellent image quality — very close to the original.

However, since the swap, the TV enters a boot loop (Samsung logo → restart) unless I enter the service menu and perform a reset.

The service mode had been previously modified — possibly by a technician or during the panel swap — and I suspect some key settings are mismatched for the European (Greece) market.

Additional issues:
- The HDMI ports behave incorrectly: port order seems scrambled (e.g., HDMI 1 acts like HDMI 2)
- No audio output over HDMI, even though video works

Here’s what I’ve tried so far:
- Adjusted Type, Local Set, Front Color, Panel Display Type, Model, Tuner, EDID Write, etc.
- Compared values with other HU8500 units
- Verified internal connections and performed factory resets

Despite this, I haven’t found the correct configuration that allows the TV to boot normally and restore full HDMI functionality. The image looks fine after reset, but the boot loop returns after power off.

📸 I can share screenshots of the current service menu settings if helpful.

👉 I’m specifically looking for the correct service menu values for this 2014 4K model in Europe/Greece, especially after a panel replacement with 55A1UU8EH. If anyone has experience with HU8500 servicing or knows the right configuration for this region, I’d be grateful for your help.

🛠️ As an alternative solution, I’m also exploring firmware engineering and reflashing. If I can reflash the firmware successfully, I may be able to reinstall the latest version (1410) cleanly and potentially resolve the boot/audio issues. If anyone has experience with reflashing on this series or knows whether this approach could help, I’d love to hear your thoughts.

Thanks in advance!

Kostas

[Davi.p]

Lotas there are codes for LG and Samsung, The Samsung ones enlarges some already big menus, Samsung menu has 3 level of menu access, the stanard one, the Advanced section with password and the full menu, he needs the full menu access to be able to give the write command next to panel type to enable it, this is what i remember..

[Davi.p]

I do not know why but the window with the panel type seems to lack some items, try to access the full menu by entering the service remote key, even by portable device + ir blaster + wav file (i have the files) , so you can unlock the panel type & front color write options..

[Diah]

go to samygo.tv and you will find complete entry service menu Photos to compare

[William1967]

Maybe the problem is the panel number, you write 55A1UU8EH but the data says 55A1UU9RH. The OCB sees a different panel than and maybe therefor the tv resets.

[lotas]

Yes, you have some strange model in the menu, it should be like this.

[lotas]

even by portable device + ir blaster + wav file (i have the files) , so you can unlock the panel type & front color write options..

Don't confuse LG with Samsung.

[Davi.p]

Lotas there are codes for LG and Samsung, The Samsung ones enlarges some already big menus, Samsung menu has 3 level of menu access, the stanard one, the Advanced section with password and the full menu, he needs the full menu access to be able to give the write command next to panel type to enable it, this is what i remember..

[lotas]

Why bother with such complications? There is a special remote control AA81-00243A, and it costs pennies.

[Davi.p]

It's up to the thread owner to decide, where is the problem? The less the items the less confusion and earth pollution

[lotas]

And before doing any manipulations in the service menu, you need to make a backup of the eeprom 24C256 (512), so that you can return everything to its original state, as it was initially, otherwise you can change something in the settings and after that the TV may not turn on at all.

[Robby-Gr]

You're right, William1967. You must have looked at the wrong panel in an internal menu;
that was from other tests. It's actually the first option, though of course, I don't know
if that one is correct either, but it's working well. Thank you very much for your help
with the issues I mentioned.

Hello Davi.p, thank you for the very quick response. Your information is extremely helpful!
Despite that, I'm lacking some technical knowledge—I'm not sure how to use the .wav files
you sent me. I will look into it, but even if I manage to access the deeper Service Menu,
I will still be missing the correct values to input. Regarding the Service Remote Control,
I will look into how I can purchase one. Thank you again for all your help. Kostas

Hello Lotas, your note and the hint with the image you sent really woke me up, because
I was taking that panel for granted and wasn't paying attention to the model listed there!
Also, the image of the remote control was very helpful. Thank you again. Kostas

Hello Diah, I will check Samy.go.tv and I hope to find something to save my old but really
very good TV. Thanks a lot, your help, like everyone else's, is invaluable

[Robby-Gr]

go to samygo.tv and you will find complete entry service menu Photos to compare

About Samsung UE55HU8500
Hello DiahI visited samyGo.tv and found one interesting post I will inform you when I have some action on it. Thanks

[Robby-Gr]

Maybe the problem is the panel number, you write 55A1UU8EH but the data says 55A1UU9RH. The OCB sees a different panel than and maybe therefor the tv resets.

You're right, William1967. You must have looked at the wrong panel in an internal menu;
that was from other tests. It's actually the first option, though of course, I don't know
if that one is correct either, but it's working well. Thank you very much for your help
with the issues I mentioned.

[Robby-Gr]

It's up to the thread owner to decide, where is the problem? The less the items the less confusion and earth pollution

Hello Davi.p, thank you for the very quick response. Your information is extremely helpful!
Despite that, I'm lacking some technical knowledge—I'm not sure how to use the .wav files
you sent me. I will look into it, but even if I manage to access the deeper Service Menu,
I will still be missing the correct values to input. Regarding the Service Remote Control,
I will look into how I can purchase one. Thank you again for all your help. Kostas

[Robby-Gr]

And before doing any manipulations in the service menu, you need to make a backup of the eeprom 24C256 (512), so that you can return everything to its original state, as it was initially, otherwise you can change something in the settings and after that the TV may not turn on at all.

Hello Lotas, your note and the hint with the image you sent really woke me up, because
I was taking that panel for granted and wasn't paying attention to the model listed there!
Also, the image of the remote control was very helpful. Thank you again. Kostas

[Robby-Gr]

go to samygo.tv and you will find complete entry service menu Photos to compare

Hello Diah, I will check Samy.go.tv and I hope to find something to save my old but really
very good TV. Thanks a lot, your help, like everyone else's, is invaluable

[Davi.p]

Not that difficult, you need a smartphone or tablet and a IR blaster, it's a simple 3,5mm mono or stereo plug with a resistor and a ir led, you can purchase it on eBay, it's 1-2 euro thing, or you can make it by yourself, it needs the stereo plug, an ir led taken from old useless remote commander, and a 100 ohm resistor, well i used a 20 ohm but it works only on my old phone, i don't know why, from tip ----resistor----anode---cathode----ring.. Put volume to maximum ad go close to the tv receiver, you need to be already in service mode, if you use stereo plug, join center ring to gnd ring, you have to play the wav file by a file manager like total commander for android..

[Robby-Gr]

Not that difficult, you need a smartphone or tablet and a IR blaster, it's a simple 3,5mm mono or stereo plug with a resistor and a ir led, you can purchase it on eBay, it's 1-2 euro thing, or you can make it by yourself, it needs the stereo plug, an ir led taken from old useless remote commander, and a 100 ohm resistor, well i used a 20 ohm but it works only on my old phone, i don't know why, from tip ----resistor----anode---cathode----ring.. Put volume to maximum ad go close to the tv receiver, you need to be already in service mode, if you use stereo plug, join center ring to gnd ring, you have to play the wav file by a file manager like total commander for android..

I thing is better to buy one service remote control is very chp!. After that I will enter the settings I found in SamyGo.Tv Diah send me I will inform you when I will be ready

[Davi.p]

i tapped the link someone gave to you, i do not find the instruction there, since you seem not practical, i suggest you to ask what to do of what you see exactly before doing actions..

[Diah]

About Samsung UE55HU8500
Hello DiahI visited samyGo.tv and found one interesting post I will inform you when I have some action on it. Thanks

the link i gave you are threat name Defult Service Menu Setting UE65HU8500 , at first post there are link for the photos of service menu.