Thank you for supporting MAKERbuino and welcome to the forum
I am sorry for the problems that you’re experiencing.
When you interrupt the loading process, the console’s memory will be blank so you have to do a hard reset like this:
- insert the SD card
- turn the console OFF
- hold the C button
- turn the console ON
- release the C button
- wait for 30 seconds
The SD card loader menu should appear.
Are you 100% sure that you followed the steps accordingly? (It is very important that you power-on the console while holding the C button).
Also, did you try to reinsert the SD card a couple of times and blow in your SD socket really hard (this will clean the dust particles in the socket).
After that, try doing the hard reset again and tell us what happens.
Thank you for your patience and understanding.
Don’t give up!