The backlight is on, but there is no picture due to corrupted software.
This specific firmware is configured for 1366x768 pixels (HD Ready), commonly found in 32-inch panels. Refresh Rate: "REF60" indicates a 60Hz refresh rate. Download MS338 PB818 1366x768 REF60 part08 rar
If a motherboard is replaced, the firmware must match the panel's native resolution (in this case, 1366x768) to display correctly. The backlight is on, but there is no