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troubleshooting [2018/06/22 22:13]
arthur [What is wrong with MKS ?]
troubleshooting [2018/11/06 11:09] (current)
arthur [SD Card problems]
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 * Route wires for motors and mosfets away from signal cables ( endstop, thermistors,​ USB, etc ) * Route wires for motors and mosfets away from signal cables ( endstop, thermistors,​ USB, etc )
 * Try rebooting the host computer ( especially if the host is a Raspberry Pi ) * Try rebooting the host computer ( especially if the host is a Raspberry Pi )
 +* If printing from a Raspberry Pi ( e.g. from OctoPrint / OctoPi ), ensure that the Pi's power supply is capable of supplying the required current at a high enough voltage. The official Raspberry Pi PSU supplies up to 2.5A at 5.1V. Low voltages can cause USB communication issues, as well as SD card corruption and other crashes. With a Pi 3 B or 3 B+ you can monitor under-voltage events by watching for the Pi's red power LED turning off, a "​lightning bolt" icon being displayed over HDMI, or you can run ''​dmesg | grep voltage''​ in a terminal/​over SSH.
  
 See the [[http://​smoothieware.org/​usb|USB]] page See the [[http://​smoothieware.org/​usb|USB]] page
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 </​callout>​ </​callout>​
 == SD Card problems == SD Card problems
 +
 +=== My SD card won't work ( LED4 is off at boot )
 +
 +If your SD card will not work, configuration is ignored, and LED4 is off at boot ( and boot takes longer than expected ).
 +
 +The reports of problems like this are rare, but users have reported the following fixes to work : 
 +
 +* Clean up the SD card socket with an alcohol/​IPA-imbibed piece of paper
 +* Clean up the SD card socket with compressed air
  
 === My external SD card ( in my panel ) is not working correctly === My external SD card ( in my panel ) is not working correctly