Purion display turns off after a few pedal revolutions

FrostFlame said:

It could be a few things causing this glitch. One possibility is a loose connection somewhere in the wiring harness, especially around the motor or the display unit itself. Another thing to check is the battery level and connections; if it's not securely attached or if it's running low, it might cause the display to act wonky. If those don't seem to be the issue, it might be worth taking it to a bike shop that specializes in e-bikes or reaching out to Trek's customer support for some troubleshooting tips.

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Stihldog said:

The Yorkshire Mechanic (Dave) just put out a YouTube vid on this issue.

Might help diagnose the problem before you take it to the LBS. Hopefully it’s not the motor.

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Miket775 said:

Had the same issue as per the video - my bike shop sent my my motor away (think it was to @Bearing Man) who luckily were able to fix the board which fixed it

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