my frame produces strange 3-seconds noise about every 2 minutes. This is accompanied with rapid blinking of red diode on the back of the unit (it is actually inside, but light leaks through a hole). Sound is somewhat similar to old HDD access -- quiet, trrrrr-r-r-r, like reading head jumping around the disk :-). Sorry -- can't explain better.
- Is it normal/expected?
- What is it? (I have a theory -- it has to do with the fact that at that moment frame download images and writes them to memory). Is there micro-HDD in this frame?

