Koss DVD player troubleshooting

NO POWERCheck if the on/off button on the front of the player is set to on.
Check if power plug is properly connected.
Check if there is power coming from the AC outlet by plugging in another appliance.
NO PICTURECheck if the TV is switched on.
Select the correct AV input on the TV.
Check the video connection.
Check if channel selector is set to AV on the TV. (See your TV manual for instructions). When Progressive Scan is on, there is no video output signal from composite video output. In order to use Progressive Scan feature, you need to connect the TV and DVD player through the component video outputs. Press the V-SELECT button to select the correct video output mode. Otherwise no picture or distorted picture will be found.
DISTORTED PICTURECheck the disc for fingerprints and clean with soft cloth, wiping from center to edge.
Sometimes a small amount of picture distortion may appear. This is not a malfunction.
The disc format does not match the TV-set used (PAL/NTSC).
Ensure that ONLY one video output is connected.
NO COLOR IN PICTUREThe disc format is not according to the TV-set used (PAL/NTSC).
Ensure DVD player is not connected through VCR.
PICTURE INTERFERENCERelocate the unit further away from possible interference or emission source (e.g. Radio, Power Amplifier, radiator etc.).
NO RETURN TO START-UP SCREEN WHEN DISC IS REMOVEDCheck to see if the program requires another disc to be loaded
Reset by unplugging the player from the power, then connect the power again
THE PLAYER DOES NOT RESPOND TO THE REMOTE CONTROLAim the remote control directly at the sensor on the front of the player
Avoid all obstacles which may interfere with the signal path
Inspect or replace the batteries.
NO SOUNDCheck audio connections.
If using a Hi-Fi amplifier, try another sound source.
Check that DTS digital out is selected in the Audio Menu if a DTS disc is played.
Ensure there is a DTS decoder connected when selecting DTS.
Clean the disc.
Check if the disc is defective by trying another disc.
NO AUDIO AT DIGITAL OUTPUTCheck the digital connections
Check the Digital Out menu to make sure that the digital output is correctly set.
Check if the audio format of the selected audio language matches your unit capabilities.
DISC CANNOT BE PLAYEDEnsure disc is placed properly into the disc tray.
YOU HAVE FORGOTTEN THE PASSWORDWhen the disc loading tray is empty, press Number Key 7, Number Key 6, Number Key 4, Number Key 1 and Number 8 on Remote Control in order