Whenever I try to burn at 4X on my Pioneer 105 using Ritek G04’s I get a Power Cilbration error, you hear the drive spin up,then stop,spin up again,then stops …does this about 5-6 times then the error occurs (latest DVD Decrypter) This is at the very start of a burn so no coasters are happening, If I choose 2X speed it always works fine,I’ve tried 2 differant G04 batches with the same results ,any ideas? Thanks.
Heres a screencap of the error:
Hi,
I got the same problem with some RitekG04.
I tried RecordMax and Nero and I managed only once over 10 to burn at 4x with Nero but with CRC problems. The max speed is more 2x and not always working.
Any idea ? I though that RitekG04 were good media… 
Bye.
Aeris
The power calibration error occurs in some cases, when the lens is dirty. When the drive worked properly with these media before, it might indicate this problem.
IMO, a cleaning CD is insufficient in such cases. You have to open the drive and clean the lens thoroughly. Hope that helps.