Turn the left one trimmer from 980 to 667 and now it works with most brand of DVD-R and CD-R.
-Riteck G04, now works ok, before worked only 10% of it approximately;
-Memorex DVD-R now Work ok, before no one was read;
-Princo DVD-R 4x, now work, before no;
-Memorex CD-R, now work ok, before nothing...
Copy and past from a post at X-S. Good luck, I have yet to try this on any of my Philips drives I have. Maybe when I get board one day...