I have a stock, original Wanhao Di3 that has started having an intermittent problem. It will be chugging along fine, then the LCD will go blank and the print stops, as if power has been cut,m even though can still here The PSU fan running. My thought is that the PSU is giving out. Any other theories out there, or has any one else had this issue? Thanks in advance from your Google + 3D printing janitor 