Inside the service menu (usually accessed by pressing Menu then 1147 on the remote), look for "LVDS Map." If you flash the wrong resolution firmware (e.g., 1366x768 firmware on a 1920x1080 panel), the screen will go white or display rainbow static. This is reversible, but scary.
The solution is rarely the firmware. It is usually a blown capacitor on the power supply or a dying backlight LED. But if you truly need the software, ignore the brand. Find the chip. daewoo tv firmware download
It voids your warranty (which is already expired). Find the white sticker on the main logic board. You are looking for a code like TSUMV59 or V56 or MSD309 . That is your actual TV model. Inside the service menu (usually accessed by pressing