My nx501 says invalid disc when I put a cd in I

I had a similar problem when I forst got my CD changer, and I had put the CDs in the cartridge upside down. You may want to try it at lease...You may, if it is an old changer, get a can of compressed air and blow it out, it may be dusty inside....Just some thoughts...

Well, Recommend contacting a local car audio professional or Clarion customer support directly here:

https://clarion.com/xe/en/user-support/inquiry/contactus

Hello
DVD cleaner is a kind of CD, which will have cleaning pads sticked on it. When we insert the disc in any disc player, this cleaning pad will come in contact with the lens of the reading head. As the cleaning CD spins at hing speed inside the disc player, it will wipe out all the dirt and dust, if accumulated on the lens. Thus cleaning of laser pickup lens occurs.
This cleaning disc can be boutght from most of the electronic spare part shops at your town. Even after using this disc, your DVD player does not reads any disc, its laser pickup assembly is faulty, and should be replaced. OK.

If it says "invalid key code" there are two possible options.

The first is the simplest. It means you've entered it wrongly. Make sure you see the difference between an 'S' and a '5' and between a 'O' and a '0'. Also make sure everything is in caps.

If you've tried every possible option, tried it over and over, and it still doesn't work, it means the CD Key code has already been used. A CD code can only be used once on a computer and cannot be used again unless uninstalled, this is to avoid copying the disc and then selling. If this game is brand new, then I don't think this could be an option.

Anyway, since a CD key is such a frequent asked question, I have made a tip of it with all possible info.

http://www.fixya.com/support/r4739247-computer_game_product_code_installation


Hope this all helped!

clean your lens and change the cd 

can you get into the BIOS? if so, change your boot order to cd-rom first.

Sounds like the CDR deck has an issue. When the disc comes out has it's position changed i.e has it been spun at all? Can you hear any motors moving? Does it work with any type of disc ( cd/cdr/cdrw)?

This is a dedicated audio recorder. Therefore, you must use dedicated audio discs (not data discs). You can tell the difference as audio discs specify the recording time (usually 80mins) instead of data capacity (usually 700MB).

When you have the right disc inserted, press the record button & it will go into record standby, ready to record. First, set a level, then press record again, and you are recording.

To fix this problem, buy CD-R Blanks with word MUSIC CD-R MUSIC

Not a disc cleaner you need but a lens cleaner. If that does not work then there are electronic or mechanical problems and most likly not worth repairing.