There seems to be a problem endemic to the PB 1400 CD ROM drives, and that is that after some time the drives will no longer mount any CDs. You can put a CD in, but after 14 blinks of the LED, nothing further happens. /
The only thing I noted as a potential fix was a small dial:

After getting brave I decided to try and turn the dial and see what happens. / Nothing happened until I got about 3/4 of the way around and all of a sudden it fired up instantly. BINGO ! After that it mounted every disk I threw at it. If I had to guess, the dial is a focus setting and after use, the dial vibrates out of focus.

I told someone else who had this problem with a 12x CD ROM for a PB 1400 and a 12x CD ROM for a PB 3400. He tried the same steps I did and was able to fix both.

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