best bet would be to open them up and figure out the panel verision and connection type then go from there.
Your LCD panel is most likely 720x480 or 800x600... if you're lucky it may be 1024x768 .... you'll then need to find compatible lvds board.
Also if those are old they may have cfl tubes instead of leds so you'd also need separate inverter or you'll need to hack the backlight.