JVC LT-55C870(B) Corrupt Software??

[Russ17]

Hi,

I have a JVC LT-55C870(C). All that happens upon applying power is the red led flashes slowly (1Hz).
If I hold the OK on the remote while powering on, the led flashes at 2Hz, but without a USB Device attached, it obviously does nothing, no screen or backlight.

Any thoughts on this being corrupted software?

Owner says the TV experienced a power surge.

If software is a possibility, can someone point me in the right direction to download the correct software. Is there a procedure to force software to load from USB?

All voltages seem to be present (LED 80v, 25v , 12v and 3.3v locally regulated on the main board. Tried disconnecting the T-Con, no change, tried disconnecting the LED strips from PSU - no change.

Thanks in advance.

Regards

Russell

[Russ17]

Re: JVC LT-55C870(B) Corrupt Software??

So, I acquired a main board 17MB130E from a JVC LT-43C888 which is also a 4K panel but a different type of course.
I wanted to see if the panel was working and backlights were OK

To my surprise , the TV boots and is functioning as expected with a digital signal, but doesn't find any terrestrial HD channels.
Netflix will load to the Home Screen but upon playing a program it gives error tvq-pb-101(8.1), which is something to do with data on the streaming device. I had signed out of the previous account without trying it and am using my own account.
ITV X doesn't work but YouTube does.

Looking in the service menu, it shows that the mainboard thinks it is addressing a 43” panel aa you would expect.

So the conclusion is that the original main board probably does have corrupt software.

The question is can anyone on here help me find the right version for this TV?

Thanks for reading and any help you might offer.

[Russ17]

Re: JVC LT-55C870(B) Corrupt Software??

So it seems anything which requires a HD signal will not work. It seems very slow to start up and takes a good minute to connect to the Wi-Fi.

Can anyone help with the firmware for this JVC LC-55C870 with a 17MB130E mainboard?

Thanks in advance

[yokoono]

Re: JVC LT-55C870(B) Corrupt Software??

Wireless update is not possible?

[Russ17]

Re: JVC LT-55C870(B) Corrupt Software??

I am trying to get software for the bad 17MB130E (from the LT-55C870(B)) which doesn't boot, so no updates through the menu or OTA updates are possible.

The other 17MB130E board is being used temporarily, only to test the panel and backlighting. I don't want to update this board as it is working (mostly). I did try an OTA update for this board, to see if it would improve the functions (Netflix not working and no HD channels) but no software was found.

[Russ17]

Re: JVC LT-55C870(B) Corrupt Software??

Rear sticker attached

Hi,

I have a JVC LT-55C870(C). All that happens upon applying power is the red led flashes slowly (1Hz).
If I hold the OK on the remote while powering on, the led flashes at 2Hz, but without a USB Device attached, it obviously does nothing, no screen or backlight.

Any thoughts on this being corrupted software?

Owner says the TV experienced a power surge.

If software is a possibility, can someone point me in the right direction to download the correct software. Is there a procedure to force software to load from USB?

All voltages seem to be present (LED 80v, 25v , 12v and 3.3v locally regulated on the main board. Tried disconnecting the T-Con, no change, tried disconnecting the LED strips from PSU - no change.

Thanks in advance.

Regards

Russell