How compatable are laptop parts

[gadgetkeith]

im looking at a friends hp pavillion dv9500 that looks fried or somthing as it wont power up anymore

have checked all the usual stuff mem hdd seating etc and batt and power suply

was wondering as it has an internal tv card and remote

the card looks as if it would fit my acer mecanicaly

would it just be a case of fitting it and finding drivers etc

or would there be volage probs etc

what im asking is basicaly are theese type of things universal through different manafactuers

thanks will await reply

gadgetkeith