Audio Systems: 6 CD Loader is not reading the CD, nissan pathfinder, cd loader

Question
I have 2001 Nissan Pathfinder that I bought recently. Originally, it was equipped with 6 CD loader and  Boss Cassette AM/FM Radio on the dash board but the previous owner took off the Cassette and installed single Sonny CD. He however kept the original Cassette AM/FM Radio, which he handed over to me when I bought it. Because I prefer the factory audio to the Sony CD, I pulled out the Sony and reinstall the factory Cassette AM/FM Radio connecting it to the 6 CD loader, which was never taken off. The plugs were intact, so there was no problem in the re-installation. After the installation, the radio and cassette were working fine but the CD says "no disc" after loading 6 CDs. After searching all the CD slots, it will finally display an "error". In other words, the CDs are not being read. I used different CDs to no avail. Any idea on how to resolve this?
Thanks

Answer
The Laser eye its defective and that is the reason why it takes the discs and reads them one by one at the end there is no disc information , your cd changer needs to be repair or replace, if there is no local service center in your town check united radio or oemautosound.com

good luck