short answer as I understand your questions would be no.........
the ribbon cable that carries information to your LCD is digital and there is no easy way to figure out which each tiny connector inside that ribbon cable does...... and then try and make some kind of converter to analog signal and then....... (RGA) they do sell these kind of things sometimes depending on the model display but are expensive and end up not being cost effective unless your re-purposing a large scale of screens for a security system or something.
then you need power....... DC current at the input side of the inverter for the display. So you would need to buy or make a DC generator,
i have variable output type that was built about 30 yrs ago, to test any kind of DC equipment, it's quite large but only because its power output if needed is significant....more then enough to power headlights of a car.
A standard desktop LCD type of display might work with some type of VGA ---> RGA connector, i haven't done anything like that in about 10yrs thou so not sure........ also not sure it would look good.
Yrs ago these types of mods were more common, people are still doing them for special purpose stuff..........today, with a used TV or LCD off craigslist for $20-50 it's not cost effective anymore. (your time, parts etc).
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