Hi all pro out there…
i have just purcased a new AVR-MT-128
and i have being able to program it 10 times with icsp
but now i cant reprogram it again at all
no response. i also notices a jumper on the main board
what is it for?
as i am a newbie i like to ask you all what can i do from here
or what should you test with ?
i searched the forum to try to find any easy steps but could find anything
regards Jörgen 
May be you programmed device clock source options. CKSEL3…0 . if you did you must supply clock to selected option. If no your device will not respond. :roll:
I just had a look at the schematic on the Olimex web site and couldn’t see a jumper anywhere! There is a two pin input for measuring frequency.
AVRs can have a problem with their fuses if they are accidentally set wrong, disabling low-voltage programming. If that happens the only way to reset them for normal operation is with high-voltage programming, which you can’t easily do with the chip soldered in. There is quite a lot on this problem on the AVR Freaks forum:
It might be something else, of course, like a faulty board.
Leon