No eject button

To perform a hard reset on a Pioneer CDJ-400, follow these steps:
1. Turn off the CDJ-400 by pressing the power button located on the front of the unit.
2. While holding down the Eject button (located on the top left of the CDJ-400), turn on the power switch.
3. Continue holding the Eject button until the display shows "PIONEER CDJ-400."
4. Release the Eject button.
5. Press and hold the Track Search Forward (">>") button and the Track Search Backward ("<<") button simultaneously.
6. Keep holding these buttons until the message "Resetting All Data" appears on the display.
7. Release the Track Search buttons.
8. The CDJ-400 will perform the hard reset and return to its factory default settings. This process may take a few moments.
9. Once the reset is complete, the CDJ-400 will restart.
Please note that performing a hard reset will erase any custom settings or saved data on the CDJ-400. Use this option with caution and make sure to back up any important data before proceeding.

Try the following. kindly update result here in comments

Depending on the model number of your DVD player, simultaneously press the POWER + STOP + EJECT buttons.

If the disc tray still does not open, simultaneously press the DISC1 + STOP + EJECT buttons.
NOTE: This step may not apply to all models as DISC1 is not available on all DVD players.

If this does not work and if the DVD player has DISPLAY and PREV buttons, press and hold the DISPLAY+PREV buttons for two seconds to unlock the drawer.

You may need to reset the ink counter. Try one of the following solutions.

THis is the procedure I used for an MP470. It is basically a modified version of that previously posted for the MP460.

1. Disconnect the power cable.
2. Hold down "On/Off" button.
3. Reconnect the power cable.
4. With the power button still down, press the "Stop/Reset" button twice.
5. Release the "On/Off" button.
6. The printer is now in "factory mode".
- wait until "idle" is displayed.
7. Press the right arrow button (next to the "OK" button) repeatedly until "Shipping Mode 3" is displayed.
8. Press the "OK" Button
9. Wait until "Without Cleaning" is displayed and then presss the "Stop/Reset" button once. (I pressed the ok button after Stop/Reset button on my MP470).
10. A test page should print.
11. Open the cover.
- the cartridges should position themselves at the far left - the cartridge removal location.
12. Disconnect the power cable.
13. Remove both cartridges.
14. Close the cover.
15. Reconnect the power cable.
16. Press the "On/Off" button once.
17. Wait until a "Replace Cartridges" message is displayed.
- insert cartridges.
18. Wait until the printer is operating in its normal mode. The display shows the normal start menu (ie: Copy).
The ink levels have been reset.
- check by going to printer>properties>maintenance>view printer status

this is what i had to do to get it to work with canon mp460
1. Disconnect the power cable
2. Hold down power button
3. Reconnect the power cable
4. With the power button still down, press twice the "Cancel/Stop" red button
5. Release the power button
6. The printer is now in factory mode...(wait about 30 seconds until it says "idle")
7. Press the down arrow (next to the "OK" button) until it says "Shipping Mode 1"
8. Press the "OK" Button
9. Now with it displaying "Without Cleaning" press the power button
10. A test page should print
11. Now open cover
12. Disconnect the power again
13. Take both cartridges out like normal
14. Close cover
15. Reconnect power cable
16. Press power button
17. Replace cartridges

MP-160 is different from MX300 so I tried my best with it...
The main solution is to reset the entire printer:
1. Disconnect the power cable
2. Connect it while holding down the power button
3. With the power button still down, press twice the "Cancel/Stop" red button
4. Release the power button
5. The printes turns into a kind of factory mode...(wait for about 10 seconds, utils it says "Idle")
6. Press the ">" (next to the "OK" button) once."Shipping Mode 3"
7. Press the "OK" button.
8. Press "OK" again for "Without cleaning"
9. A test page will print..
10. Open the cover, like you are about to change the cartridges.
11. Disconnect the power cable again.
12. Take out both cartridges.
13. Close the cover.
14. Connect the power cable once again.
15. Turn the printer on.
16. Now just put the cartridges back...

try this

Manual reset methods several EPSON Stylus Color. Actually there are two methods to reset epson printers counter, that is using software resetter such as adjustment program or SSC service utility or using manual by combination pressing button on the printer. If Reset using software resetter you can follow the way of usage the software but sometimes software resetter for the printer is not available. The only way to reset the printer if software resetter not available you can use manual reset.
The Following manual reset for some EPSON Stylus Color Printers:
1. EPSON Stylus Color
Pressing and holding ALT+FONT+LOAD+PAUSE buttons combination
press POWER button
Release all buttons
2. EPSON Stylus Color 300
3. EPSON Stylus Color 400, 600
Pressing and holding LOAD/EJECT and CLEANING buttons
press POWER button and hold it until you will see blinking INK OUT and PAPER OUT leds
Release all buttons
In 2-3 seconds time press LOAD/EJECT and CLEANING buttons again.
4. EPSON Stylus Color 440, 640, 740, 460, 660, 670, 760, 860, 880, 1160
Pressing and holding LOAD/EJECT and CLEANING buttons
press POWER button and hold it until You will see blinking INK OUT and PAPER OUT leds.
Release all buttons.
In 2-3 seconds time press and hold CLEANING button, until all leds will blink.
5. EPSON Stylus Color 680
Pressing and holding LOAD/EJECT and CLEANING buttons,
press POWER button and hold it until You will see blinking INK OUT and PAPER OUT leds.
Release all buttons.
In 2-3 seconds time press and hold LOAD/EJECT button, until all leds will blink.
6. EPSON Stylus Photo 785, 895
Pressing and holding Maintenance and Roll Paper buttons
press POWER button, You will see blinking Error led.
Release all buttons.
In 2-3 seconds time until led is blinking press and hold for 10-12 seconds Roll Paper button, until all leds will blink.
7. EPSON Stylus Photo 890, 1280, 1290
Pressing and holding Maintenance and Roll Paper buttons, press POWER button, You will see blinking Power led
Release all buttons
In 2-3 seconds time until led is blinking press and hold for 10-12 seconds Roll Paper button, until all leds will blink
In 2-3 seconds time press LOAD/EJECT and CLEANING buttons again.
8. EPSON Stylus Color 800, 850
Pressing and holding LOAD, CLEANING Color and CLEANING Black buttons
press POWER button and hold it until You will see blinking INK OUT and PAPER OUT leds.
Release all buttons.
In 2-3 seconds time press and release CLEANING Color button, You will see leds blinking.
9. EPSON Stylus Color 900, 980
Pressing and holding LOAD/EJECT and CLEANING buttons
press POWER button, You will see blinking INK OUT led
Release all buttons
In 2-3 seconds time press and hold CLEANING button for 10-12 seconds.
10. EPSON Stylus Color 3000
Pressing and holding PAUSE, LF/FF and DOWN ARROW buttons
turn on printer.
Release all buttons.

Assuming it is one of the older style ps3's you can usually get it out without opening up the machine:

1. First shut down the system by flipping the power switch in the back off.

2. Hold down the eject disc button.

3. While still holding down the eject button, flip the power switch to turn back on your PS3.

4. When the green light comes on, wait a few seconds then tap the eject button a couple times. The fan will run on full power and the disc will eject.

HI

Unplug the ac cord. Wait a minute. plug the ac cord back in , hold the press on the ON button and Eject button at the same time while turning the power on. Hold for 5-10 secs.

See if that does anything

( I picked the idea up somewhere else so I cant guarantee anything)

turn it off and then disconnect it..

press & hold the eject button

I've had GREAT success by resetting the changer. Try unpluging the changer with the power ON, wait a few, then plug back in. It's not hard to remove. Can I assume that you did NOT misload or install any CD' upside down? If not, then proceed with a reset. Can you eject the magazine? If so, proceed with reset. If you can NOT eject the magazine, then you will need to "open up the can" and do a manual eject with power assist by moving the gears while pushing the eject button. Sounds like a lot, but for me it's easy. Remember patience!!

Larry T
Winona Lae, IN
http://www.cybersoundsaudio.com/cybersounds/vehiclepics.html

Upper right-hand corner, there's a button next to the "eject" button. Pressing this button while the unit is on will cycle between displaying the clock and the track number & play time (CD) or clock & radio station.
When the unit is off, you can press the same button to completely shut off the display, which is sometimes nice if you don't want the blue ring around the volume knob glaring in your face.