Radio Replacement

curious question, anyone ever had to have their radio replaced? I have had 2 replaced so far. Now it is going south. On occasion, it will not turn on. The solution is to pull over, turn the car off, and thern restart. 9 Out of 10 times this works. Sometimes it will go on by it self in 10 minutes or 1 hour. Gas filler door was repaired 2 times. Will not open without jambing something under the lever and using a credit card to pry door open (a ATM card may also work). Of course the dealer in Torrance CA, has never seen this before