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Answer:
1. Make sure the child lock feature is disabled.
Try to open the disc tray.
If the issue still occurs, power off your DVD player.
Unplug the power cord for 30 seconds and then plug it back in.
Power on your device.
Try to open the disc tray.
2.Look for a Touchpad switch on the keyboard
Press it and see if the cursor starts moving again. If not, check your row of function keys at the top of the keyboard In most cases, you'll need to press and hold the Fn key and then press the relevant function key to bring your cursor back to life.
3.Verify the keyboard is plugged in securely. Disconnect the keyboard from the computer and reconnect it into the same port. If you have a USB keyboard, you may want to try a different USB port to isolate the issue.
Explanation:
correct if I'm wrong.