If the board is scorched beyond repair, you can find replacements on sites like AliExpress or eBay by searching for the or the Dell-specific part number 790JW1400601R00 . Are you seeing specific component damage? Tell me: The part number of the burnt component (e.g., R801, D202). The symptoms (e.g., "no power" vs "no backlight").
Inspect the solder joints around the inverter transformer and the CCFL connector pins. The high voltage and heat can cause the solder to crystallize and crack over time. Resoldering these joints often cures the problem. Safety Warnings Ilpi-354 V.a Schematic