When I plug my Arduino/Ramps using the usb cable I get see the Marlin software on my lcd just fine. I can navigate the menus and make selections. When I plug the power cable into the Ramps the lcd is blue and no Marlin software is viewable. Now, everything worked just fine up until the point I plugged in two motors to the X stepper. I noticed that both motors were plugged in incorrectly. I switched the connection and the motors moved just fine. This is when I noticed that the motors would begin to work intermittently. I would have to spin the dial very slowly to get the motors to spin again which would work for a few seconds before it stopped for another few seconds. I unplugged everything and re-plugged the power cable and that is when I noticed the blue screen with no Marlin software.
I figure that I either fried the Ramps board or there is a loose connection in the green male or female plug. Since it works when plugged into the Arduino but not the Ramps. Any ideas as to what else I can troubleshoot.
I was not using that power block at the time all this happened. I was actually using this one
I ended up switching power blocks in case that was the issue. As you can see from the photo it did nothing to resolve the issue.
So another update, I plugged in the power block first then the USB and was able to have a normal screen. I was also able to drive my motors from this setup. I tested the voltage on the green connector to the Ramps board and I am getting 12v so no issue getting power there. I am thinking it might be a bad Ramps board because it was working fine a day ago and all of a sudden my LCD is no longer displaying the Marlin software.
I forgot to add this
Did you buy everything from here? Not everything
a)If you didn’t or changed some things please don’t leave out any details. All links listed below
Let me try and recap. Your screen only works with the usb plugged in, not just the power supply?
If that is the case your arduino voltage regulator is probably bad.
