DVD ejected, having been viewed previously

Well, the DVD looked in sparkling condition. That was what prompted me to reload it a few more times after the first failed attempt. It had only been viewed once before we were lent it.

The next disc in the series plays fine on the PB.

The problem disc played fine on the iMac.

We have subsequently watched two films without trouble on the PB.

Before replying to your post, I tried the offending disc in the PB, and it worked! So I ejected it and gave it another try to see if I could repeat the success. It was ejected!

I shall give the superdrive a clean with a lens cleaner as you described. We used to have one somewhere …

Thanks for your reply.

Thanks for that suggestion, BD. I'll be able to give it a shot later today.

I'll report back.

I found the lens cleaning CD and gave it a whirl, but the 'Cleaning!' track stopped progressing at 10.09 minutes, the track being 35 minutes long.

That CD opened iTunes. Another thought - I'll try some audio CDs later on today as well.

The DVDs in question belong to the set in 'Cosmos' - Carl Sagan's TV series. Discs 1 and 3 have been fine. Disc 2 is the one causing the problems. Oddly enough we watched a film on DVD last night and had to hook up an external DVD drive to view.

Followed your set of instructions - safe boot etc. - but no change.

I shall see what happens when we try to watch something this evening.

Can't make too much sense of it all other than having a sneaking feeling that the optical drive is on the blink.The PB was ten years old in October, and we have watched an awful lot of films on it.