AVR-Chat

--- In AVR-Chat@yahoogroups.com, Ken Holt <kholt@m...> wrote:
> While skimming and deleting this thread, I have just been 
debugging a 
> returned
> board that does seem to have a fuse/lockup problem.  I cannot 
reach the 
> Tiny26
> through the ISP (STK500 cable); but the Tiny continues to operate 
it's 
> pre-downloaded
> program.  I assume that the serial enable fuse was accidently 
turned off 
> by someone,
> and now there is nothing that can be done to load new code.
> The Tiny is an smt, soldered in place, and even if I could get it 
off 
> cleanly, I don't
> think there's any way to place it on the STK500.
> Should I assume there's no way to move forward?

I had a similar problem lately. What I did was: remove the 'faulty' 
AVR (a Mega8 with accidentially disabled Reset line) using a smd 
repair hot air gun, clean and reflux the board and solder on a new 
one. Not a big story if you have the right tools at hand or know 
someone who has (takes about 2 minutes that way). And not a big loss 
to trash a ~$2 part - what do you pay for a Tiny26 that you are so 
concerned about the thing?

Stefan