Hi please help me if possible. I cannot connect through serial connection. I bought Usb-COM-TTL device. It is working as Prolific Usb to Serial bridge. I have disassembled kindle and connection to 4 ports you showed. If I change Tx and RX odd characters occuring but I could not make normal connection. Is it possible connect it while kindle in restart state? Or it should be in recovery state? or in any state I can see connection? I really cannot connect to this serial I think I have bricked it
. I leave outside of US. And I cannot have Kindle support.