I've been searching for a solution for my error described in title bar. Nothing so far. Okay, whats going on: I've an original Uno, and recently bought an clone Mega2560 v3. I'm working with Windows Vista / Arduino IDE 1.7.6 My Mega2560 is only connected to the USB cable, and NOTHING (so plane board) is attached to my Mega2560. Trying to upload the simple original blink program. At 95% it takes a while and now and then i see the onboard RX led blinks Tried the following "solutions" - used direct motherboard powered USB port instead of computers front USB port-> No result - in the control panel Windows -> device manager -> COM & LPT1 selected the MEGA, and updated the drivers in the installed local drivers directory (Not pointed at the FTDI directory)-> no result - connected the D0 and D1 with a cable, and indeed in the line in my serial screen i type a few characters, and after pressing enter they show up on the serial monitor. - of course checked the right com port and board type in Arduino IDE (otherwise the serial wouldn't do nothing) - i checked in MS Word the board.txt file and it was already set to "wiring" -> complete line in the boards.txt shows like "mega.menu.cpu.atmega2560.upload.protocol=wiring" - I pressed the reset button a dozen of times before / while uploading, and no uploading possible (only the power led blinks for 1 time (the reset action) - i've used the option an Arduino as an AVR ISP and burnt a new bootloader - After this option i was able to upload the blink program but ONLY ONCE, i changed both the values for High and Low, and tried to upload the blink program again. -> No result again the timeout error displays.
What to do ? Anyone suggestions ?