ok yeah i was having the same problem with my 4600mp i think thats the moddle number
what causing it to do it is curosion
excuse the spelling
but its an easy fix i fixed mine 2 weeks ago
find a bottle of rubbing alcohol and a q-tip
and basicly rub the contacts till it gets shinny
be careful not to get the cotton fuzz stick on the contacts
theres nothing wrong with pioneer its just simple maintinance
