If the disc tray of your AKAI STD 2000 does not open when you press the Open/Close button, follow these steps to try to resolve the issue:
First, check the power and the remote control: Make sure your device is turned on by checking that the power button is engaged. Also, check that your remote control is working properly by ensuring that the batteries are charged, then point it directly at the infrared sensor located on the front of the device. Remove any obstacles between the remote control and this sensor.
Turn off and restart the device: Press the power button to turn off the player. Then unplug the power cord from the outlet, and wait at least one minute before plugging it back in. You should wait at least 30 seconds between turning off and turning on the device to avoid damaging it. Turn the player back on and try to open the tray with the Open/Close button.
Check that no disc is jammed: If you hear noises coming from the mechanism during your attempts to open it, this may indicate that a disc is misaligned or stuck in the compartment. If the tray remains jammed, the problem may be mechanical or electronic in nature.
Seek professional assistance: If after these checks the tray still does not open, it is likely that the opening mechanism is defective or there is an internal electronic issue. According to the manufacturer's manual, in case of malfunction of the player, you should seek assistance from a specialized technician or contact your AKAI dealer for repair of the device.