Can the cd be fixed or is it done for
If you get it repaired, it's going to cost you more than it's worth, you might find the same model on ebay, but as said before, might be time for a new system, with USB and possibly a jack input, which will take an output from nearly any current device, or future device. Like iphone, ipad etc.
What could have happened, is the mechanism might have been bent out of line by a previous owner forcing a cd in.
It might be a case of strip down, rebend and reassemble, but I would avoid original cd's and use your copy for the car, keep your original at home.
I never keep originals in the car for several reasons. Heat, scratches, theft etc.
CAUTION: if you are testing a CD player, with the cover off, you are at great risk from the laser led, which can cause damage to your eyes.:doh
You could buy a radio linked device that takes a USB &/or jack input, that you tune your radio into, use a frequency not used in your area.
The better quality ones work quite well, and some even take SD cards. Not a neat solution... wires everywhere.
good luck, best regards,
Rustic