After 2 years of almost flawless service, I’ve recently run into the
“no disk” and “unknown data” problems with my Philips DVDR-75. ( +R disks)
Here is what I’ve found out :
In my case, it seems there may be a link with the media brand.
I’ve had the problems reading some Tayo Yuden (T02-00) disks.
My older disks, Memorex (MCC 003), are all, so far, problem free.
By using Dvd Decrypter, an ISO copy of the problem disk onto the Memorex media makes a Philips readable disk.
( All my +R burns are ISO, using Dvd Decrypter, at 4X, booktype set as DVD-ROM. )
It seems that after playing the copy Memorex disk, some how, the DVDR-75
regains the ability to detect and play the “problem” TY disks,
…BUT…only until the unit is powered down. very strange.
Maybe it recalibrates the “laser power” upon each power-up cycle? ?
I’ve also discovered a possible work-around.
Powering up the unit using ONLY the “Play” button,
( w/problem disk already in the tray )
will give me a maybe a 1 out of 5 chance, that it will detect & play the problem disks.
( if not, I get either “no disk” or “unknown data” )
I still have a few additional tests to try out, when I get the time.
If anyone has any suggestions or comments… I’d sure appreciate them.
My firmware is ff16f. Tomorrow I’ll update to ff16k and see if any of the patterns have changed.