The firmware you are looking for, with 800x600 resolution , is typically distributed as a .rar file for USB flashing on universal LCD/LED TV controller boards. Firmware Availability and Links
Using the wrong firmware resolution can cause a distorted display or "no display" state. If the picture is distorted after flashing, you may need to enter the Service Menu (usually Menu + 1147 ) to adjust the panel settings. Download R83 031 800X600 rar
: Detailed component specifications and potential firmware links are frequently shared in groups like Electronics Helping on Facebook. The firmware you are looking for, with 800x600
Direct downloads for this specific version are often found on technical forums and specialized software repositories: the standby light should blink
: With the TV power off, insert the USB. Plug in the power cord; the standby light should blink, indicating the update is in progress.