I can't believe it!
I've bought two Sony PRS-505, my friend's machine was broken (as shown above).
After the unhappy experience with my friend's PRS-505, I was quite upset and became quite careful when using my reader.
Everything was normal yesterday, I did not put my reader into any bag at all, just put it on my reading table, I'm sure nobody can touch it except me, but when I go back to check the reader out a few hours later, I got exactly the same problem as my friend!
There was no pressure exerting on the reader for a whole day.... what happened?