This is a bit of a puzzle.
I've been building Hydras for a while now. The latest schematic is at http://www.kfu.com/~nsayer/hydra/hydra_2_2.pdf
After building, oh, about a dozen boards, I've got one with a weird problem: it won't reliably start. I connect up the ISP and the LCD will show the top row of just boxes. If I briefly short RESET, the display will show the sketch starting up normally.
I'm using FF / DA / 05 as the fuse setting. I've tried raising the brownout voltage (4 instead of 5 for the extended fuse), but that didn't help.
I tried swapping out the processor, and that didn't fix it either.
Anybody have any thoughts?