Big problem wuth pioneer 105

I doesn’t want to write from some days, ritek and auvistar! It writes only princo…when i try to burn a ritek, the 99% of the times, the software (every software, dvd decrypter, recordnow, nero ecc…) gives me an error (error target failure or something else). I have try many firmware, hacked and officials…i have also formatted…but nothing…and the problem can’t be on the dvd-r’s beacuse for example, my burner now doesn’t want to write on a ritek that it will write tomorrow…what can i do?