When the cover is closed the amber light will not go out. As a result the printr will not work. If I push down on the cover very hard the light will turn green and the printer will function. What can I do to resolve the problem and keep the light green?

When the cover is open, there should be a protrusion on the upper left corner (plunger) that will activate the switch in the bottom half of the printer when it is closed. The plunger is probaby bent or partially broken since you have to press hard on the cover to activate the switch. If the plunger appears not to be damaged, then the switch itself maybe the issue. Take a toothpick or straightened gem clip to activate the switch. The light should turn green when you activate the switch. If you want to manually activate the switch, trim a toothpick or gem click to wedge the switch or you can try to repair the plunger by removing the broken remnant and drilling a hole (with a small craft drill) and use a toothpick (preferably plastic) to glue into place (you may have to use two).