>>If u have any old non working laptop try using their display strip/ inverter . [SPOILER="Note"]Note: LED and LCD have different types of strip and inverter[/SPOILER]
>>Where as in most case once the strip is reconnected to the motherboard and display then the problem would be fixed. Because of the n-number of tilts of the screen there are chances where the strip gets loosen within its connectors like the MB, Display Screen and Inverter Itself. So make sure u disassemble ur laptop properly. Since u have mentioned its an old, the design architecture would be complex and complicated. Make sure u have proper tools to perform the operations.