We remove the R13 and it still didn't work, but we blew it with a fan for a while and it came back to normal, so what's going on here? Thank you very much!
is this board your own design, or purchased from some supplier?
if the latter, is it your own firmware? Do you have any known-good reference firmware?
A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
