[X4U] laser can't calibrate for media

[John Kiss]

On Nov 14, 2006, at 3:47 PM, nk wrote:

> may I ask how you came to learn about this dust?
> was it after you pulled it out?

For some time before that, I've been seeing that message on and off.  
One day I decided to take out the drive and take a "closer" look. I'm  
into electronics so wasn't afraid to do that. The first time into the  
guts of the thing, I noticed a lot of dust on the laser lens. I used  
an 8X loupe to see it. I very carefully cleaned the lens with lens  
cleaner and reassembled the whole thing. That worked for a few  
months. A couple of more cleanings of the lens and the time between  
failures was getting shorter until nothing I did helped. When I  
looked closer I noticed that there was also dust under the lens.  
Unfortunately I couldn't access that area and ended up buying a  
replacement.