If you are talking about the SDcard that plugs in behind the buttons, there is nothing on it the printer needs to operate aside from the software that you install on you computer. The printer would work without the card even in it just by using the software on your pc and having it connected by the USB cable. The card is used for offline printing when you dont want the computer to be tied up during the print process. It sounds to me like a board issue if it will not even print one of the sample files on the SDcard. You have two options really. Get on them and keep on them till the send you a new board. Or break down and buy one from Flashforge.com which is a clone of the CYc and a closer match than the Makerbot. That board is 180 bucks however.
I just received mine last week to find out it will not connect to any software regardless of what I use. The company I bought mine from called CTC PRINTERS are idiots. I emailed them with the issue and they tell me nothing is wrong with my board. I just need to use a computer running XP. Yep you heard right. They tell me I need to use an obsolete OS. I write back asking if they realize how dumb that sounds and if I can just RMA the board and they can ship me a new one. They then respond with again use windows xp as there is nothing wrong with the board. XP had correct protocols. They then offered me a $20 dollar refund for my trouble.
At this point I am just going to get s RUMBA board and run it with MARLIN firmware so I can use any program and OS to run it.
Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.