The blue LED on the rear of the TT is to indicate the Bluetooth availability and connection status of the turntable.
Please find a brief synopsis of the different indications.
Fast flashing – In pairing mode.
Slow flashing – Searching for the last paired device.
Solid – Paired with a device.
Long solid intervals – Paired with a device using aptX/aptX HD codec.
If you do not wish to see the LED, you can adjust the switch to the left of this to the Off position.