RK Tech

My Toyota Cororral 2004 CD/MP3 player stops taking any disc now. It keeps displaying ERROR 3. I tried looking on the net and people suggested disconnect the CD player from battery to reset but no luck. Others suggested to buy a Lens cleaner disc but still no luck with my CD player. It keeps displaying ERROR 3. I'm running out of ideas. Maybe the CD player needs to be reset completely somehow and i don't know how to do that. Can anyone suggest or help? Much appreciated! Ric