I bought kit o Mega (R3) with Ramps and Graphic LCD, upload the Blink program → good.
Upload Merlin firmware → good.
I tried to connect it to a 3D printer that use 24V (and ramps etc) to test one of the motor of it to see if the ramps/mega work good etc.
The LCD got crazy so I disconnect it to see if it damaged.
I connected only the Ramps/Mega with the LCD to the PC (without the motor/Power supply) and it’s seems to work good. I see the merlin run on the LCD just like before.
But, now I can’t upload any sketches to the Arduino Mega. I disconnected the Ramps, reset my PC and nothing, I can’t see serial COM of the Mega on the Device Manager (Win7), I connected another Mega and it’s work good so it’s seems that something burn in my Arduino card.
I try to connect 12V to the power connector of the Mega to see if it will work but got not light on the power led. I connected the 5+ to the 5V/GND on the power pins and the led was lighted as usual.
My questions is:
- is there a way to fix the problem?
- is there a way to upload to this board with help of other board? (Arduino micro etc.)