You could open up the receiver (torx screws under rubber base pad) and re-seat the wifi card and any other connections. I did have to replace a wifi card in one of my receivers.
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Thread: Connection problem with receiver
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2021-08-18, 11:16 #11Main system - Rock Solid with LMS 8.2.1 on WHS 2011 - 2 Duets ( both WiFi, farthest unit gets 60% signal strength and always works since new power supply) and Squeeseslave
Cabin system - Rock solid with LMS 8.2.1 on Win10 Pro - 1 RPi 3 Model B (WiFi) /Hifiberry DAC+ Pro/PiCorePlayer and Squeezeslave
Squeezebox Boom - "At Large" player around both home and cabin
Headphones and car - Android phone/Bluetooth w/full library on MicroSD card - PowerAmp music player app (similar to Material Skin)