MEGA 2560 and RAMP 1.4 - computer does not recognize.

Hello,

I'm completely new to Arduino, and I really don't know the way around the electronics beyond wiring sockets, so I joined to seek knowledge and help. This is the first question. When I plug MEGA 2560 by itself to my computer via USB, the computer would recognize it. But when I put RAMP 1.4 with it, the computer would recognize it for a second, then tells me the device is unplugged. I take the RAMP unit off, and again, MEGA 2560 by itself, it seems to be fine. Did I get a defective unit, or did I do something to damage the RAMP 1.4, is there any easy way to test it to see what the issue is?

Thanks in advance for your input.

I have no idea what a RAMP 1.4 is. Googling only show a RAMPS 1.4.

But anyway, it sounds to my like the RAMP is drawing to much power. From what I can tell it needs a separate power supply and cannot be powered through the Arduino.

RAMPS, sorry, my mistake. I know the RAMPS is an issue, but I just don't know how to test it. I will try plugging in a separate power supply. Thanks,

Just testing one of these myself and not had the issue your having.

Do you have something to check the USB's voltage? What do you have
plugged into the ramps board?

Connected any motor drivers? Ensured they are plugged in the right
way? Reading a thread earlier where someone could not get their
motors moving and they had the drivers in backwards and actually
blew 2 of them.

Im using the DRV8825's and have 3 plugged in. Also what version of
arduino are you using?

I noticed the latest version gave socket errors with the marlin firmware
but using version 1.6.8 it works fine everytime.