Geeetech

Hi everyone. My A10M which has been working perfectly for many months has suddenly gone nuts. Every 5 or 6 layers the hot end will head to one side of the build plate (not always the same side), extruding filament while it's going, then go right back and start printing again. I end up with a bunch of loops of filament all around the outside of my print. Also, every now and again it will just stop and not move again. There's no error on the panel or bad noises, it just stops. I've tried different STL files, I've tried different memory cards. I've reset the EEPROM and loaded my stored settings. I've also tried reflashing Marlin (I've added a 3D Touch leveling sensor) and put back in my settings for steps/mm and z offset. I've also checked to make sure the cooling fan over the control board is running and all the connections are tight. None of this has helped. Any suggestions of things I should try next?

For anyone who's interested, I solved the problem I was having. But before I did figure it out it got much worse. Not only was I getting the random travels to X or Y home positions and random pauses, I was getting crazy extruder movements, like retracting several hundred millimeters very fast. The printer finally became completely unusable. I finally tried printing directly from Cura via the USB cable and it worked fine. So I was back to either a bad SD card or something wrong with the SD card reader. I bought a brand new, Samsung SD card and had the same problem. So I took out the LCD board, blasted the contacts with contact cleaner then compressed air, but no luck. The contacts inside look fine, nothings bent or corroded.

Fortunately for me I'd also purchased the Geeetech Wifi module and had it sitting here unused. So I got it out, set it up and it's working fine from that too. Not sure what my next step is, I guess I could buy a new LCD screen or attempt to replace the card reader on the board, or just use with the wifi module or with a USB cable. I'm not a fan of the USB cable approach as it's too dependent on the computer not going to sleep or having issues.