Optical receiver status light is on red
If the Alarm light is red, it's likely that the ONT has detected an error or fault. If you find that the Optical/Config/PON Light on your Fibre ONT (Optical Network Terminal) box is flashing, has gone off, or has gone red, this indicates there may be an issue with the fibre connection coming into your property. I've already tried the following: Restarted the Openreach ONT Restarted my Sky Broadband Hub Checked that the green optical cable is securely connected and undamaged Despite this, the PON light. A red or blinking light may indicate a power issue, such as a faulty power cord or a problem with the.
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