Can't connect to printer

I'll try to give you as many info as I can about my problem, so here's the long story:
I bought a robo3D printer during my travel to the US (saving a lot of money from shipping and import taxes here in brazil), robo3d team was really supportive and made sure I got the printer in time, I got a broken bed and they replaced it asap (thank you Jerry). So in order to fit the printer in a travel bag I had to disassemble some parts, I got the heated bed that was shipped (so it was already separated), the base, the threaded rods and top part where the nozzle is located.
Once I got here I assembled following the assembly videos on youtube closely but when I tried to plug it in the software didn't find any printers, I found a thread about how to fix this on windows 8.1 and did what the video said but still nothing, I also got a XXL lcd on printedsolid, pluged it in but I also get nothing on it (it turns on, kind of blinks and then stays that way, on with nothing on the screen). When I turn the printer on I can see the fans turning on so at least I know this part is ok lol.
So anyone has any idea of how to fix this or how to find out what the problem could be? Only thing I can think of is that I may have plugged something on the wrong place in the board, only way to check this would be looking at a wiring diagram and then comparing with my board, anyone have an idea of where to find a diagram?

 

I found out that some power cables were not well connected and now it kinda works via lcd screen, I can move X and Y axis but no Z or extruder. Also I still cannot connect it to my computer, even though is shows as Arduino 2560 but with no driver installed

 

ok, sorry for going nuts without a need lol I got it sorted out, for the Z axis I just disconnected and reconnected the wired and it's now working, for the driver my fix was going to the aduino website and downloading the latest aduino software, after that I opened Repetier and it can connect to my printer properly (not sure why the robo3d software won't detect my printer).
Still didn't print anything cause it's pretty late now but I tested all of the axis, heated bed and extruder and everything is working fine

 

I am having this same issue, My computer will not detect my RoBo 3D I also have a XXL screen that does nothing when plugged in. I am thinking its the control board that h as the USB on it.

 

Disconnect the ramps board from the arduino, then try connecting to the arduino directly.

 

I dont mean to be rude at any cost, but I just got this printer 2 days ago, could you elaborate a bit on what you mean? I'm not entirley sure what the ramps board is, or the ardunio. I will google it though. Thanks.