Facing TV Problems? Ask a TV Technician.
I can't find a manual for this, but on a similar RCA TV/DVD, they use the CH-^ button on the TV to eject the DVD. If not that you may find one of the other buttons is multi-purpose. On the remote, under the D Menu ^ should eject.
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If not, I hope my answer was helpful and if so a positive rating would be much appreciated.