It finally happened: I got a 'bad' used pentax.
It's a *istD L
Was listed properly on ebay, so can't complain. I have bought 6,7,8 early 6mp, K10d's, K20d's etc... and they have all worked perfectly once I've checked them over. (mostly it's just battery issues, or someone played with way too many settings)
Starts up ok (so not the 'weak' battery issue sellers continually fall for). But then says "memory card error". (What it was listed as doing). These are well know for needing old, old, 1 or 2gb SD (only) cards..... I put mine in... nope. Still "memory card error".
I've tried all my other low capacity sd cards, no joy. It is still on firmware 1.00, so an update would be great.... but I think it can only be done via SD card.
I even put some paper between the card and the door to see if more pressure would help, but still no good.
The rest of the camera seems fine, auto focus works, the beep/chirp works; without the memory card in there I can do the 'preview' by twisting the on/off switch. So it's not like the motherboard shows signs of failure.
Any other ideas? I'm not sure what to look at from this point.