When I turn on the TV on the power grid the "AOC" logo appears on the screen but it is locked, you can not turn off the TV by the power button only by unplugging the power cord.

Some say you need to update the tv firmware by rewriting the nand memory. Would it be this ?
If so, can I do the process via pendriver?
I noticed that the file is in .img format. How do I transfer to the pendriver?

main board code: 715G5801-M0E-000-004K

Try to update the firmware like this.







If it doesn't work out, try flashing the chip U406 (W25Q64) through the programmer.
Or U405 NAND (H27U1G8F2BTR-BC).

СКАЧАТЬ AOC LE32D144020-LE39D144020 Service manual : AOC LE32D144020-LE39D144020 Service manual.pdf

Where can I get the firmware of the U406 (W25Q64) chip?

Firmware search

I made the update with version 2.25 using the firmware of the AOC itself and when I went to try to tune the channels using as the antenna a piece of wire I realized that no channel had been tuned and nor the sound had.

To get started, enter the factory mode (Menu + 1 + 9 + 9 + 9 + Back) and reset the settings.
Or change tuner settings (or change tuner type) in the service menu.
Then connect a normal antenna to the TV and try again.

If you can throw the firmware (U406 - W25Q64 and U406 - NAND) on the e-mail : Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.

I got into service mode. Where do I check the tuner part? It would be where it says:

ADC
GAIN: R0 G0 B0
OFFSET R0 G0 B0

or

Scaler
Gain R122 G126 B114
Offset R512 G512 B512

The first is the ADC RGB adjustment, and the second is the adjustment Scaler RGB.
And you need to change tuner settings (or change tuner type).
But first you need to reset setting in the service menu (select and press "Reset" in the service menu).

And if it fails, select and click "EEPROM Init".
Then connect a normal antenna to the TV and try again.