The CPE board may be set for isolated ground. Verify the isolated/non-isolated ground jumper on the CPE board J9 is in the 1-2 position. This connects the isolated ground to chassis ground. A quick check without removing the lid is to connect pin 37 to pin 19 on the main GPIO header together. This will force the grounds to be connected together.
Why do the GPIO inputs on the back of my CPE equipped unit seem to be intermittent? Print
Modified on: Tue, 8 Oct, 2019 at 1:13 PM
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