I have PowerSpec Ultra 3D printer that I bought after Christmas last year. Now I have weird problems with it. The right extruder motor makes clicking noises last month and now the left extruder motor makes clicking noises. They stopped extruding filament. I tried swapping cables and I don't know which parts are bad: cables, stepper motors, stepper motors drivers, driver board, or power supply. How can I fix the problem or should I buy a new printer? If I want to buy a new printer, I'm thinking of buying the Makerfarm Pegasus 12 printer.