Question edited for incorrect apostrophe placement, removed double negative, added question mark.
To vague to answer Sophia, but I will take a guess.
We need 'make model (what is is)' in all questions.
If is is a CD player, DVD player, X-Box, Blu Ray Player, PS3 or VHS player, it will be a bad connection on the switch, an incorrectly adjusted limit switch, or a failed ejection motor.
Google
make model loading tray not opening
https://www.google.com/search?q=%E2%80%8Bmake+model+loading+tray+not+opening
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