Hi, I soldered together a Menta according to the instructions. The solder joints all look good. When I plug in external or USB power, the green power LED lights up. But when I press the reset button, nothing happens. (I understand from the instructions that the red LED should flash.) When I try to upload a sketch, I get the following error:
avrdude: stk500_recv(): programmer is not responding
If the red led is not flashing on reset, you may have a bad (or missing) boot loader (the assembly looks fine). Contact firstname.lastname@example.org with a link to this thread and ask for a replacement Menta processor.