I have > 100 HD-DVD's that are no longer playable or have bad sectors that stop playback giving an error signal.
All these discs that I bought when they first were on sale played perfectly when I played them. Few of them play now.
Of those that I have bought recently perhaps 50% play without fault either on my Toshiba HD XA2, XBox 360 or Of those that have bad sectors, the 3 methods correlate in terms of their timing.
I do not wish to form any conclusions since I am not qualified to do so, however, I will add my observations.
There appears to be 3 different appearances to the discs that will play fully.
Either the reading side of the disc shows amorphous dull areas, blemishes which look like thumbprints or multiplied areas of tiny bubbles.
When viewed under the microscope these anomalies are between the front and back of the disc.
Lastly, and most strangely, in most instances the changes in the disc are accompanied by changes on both inner sides of the Jewel Case in terms that there appears to be a greasy film in which a miniature impression of the disc appears.
Go Figure ...... Problem is, in my experience, that replacements you buy from eBay or Amazon will probably be of the same vintage and will have the same pathology.
Any thoughts, Anybody?
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