my mac on it's death bed

well my mac is done for. one hinge broke last month, now the other hinge is busted! my screen can't stay up on it's own. so it basically lays flat unless i put a huge dictionary or pillow behind it. and if it doesnt rest at the right spot the screen turns blue then red then green....ahhhhhhhhhh! i can't afford a new mac right now. dear santa if you're reading this please please please help me!