The remote down button only sometimes works
More often than not the down button on the remote wont work even though it's communicating with the box as it clicks and light flashes. Any ideas?
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buttons are mechanical microswitches which cause an electrical connection detecting it being pressed
if metal plastic or become defect and breaks or if dirt get in to cause the mechanical connection not happen or only happen periodic
you will experience what you experience, you most likely cure would be to buy a new remote, use an ios device with remote app or give it a go trying to clean / repair the button yourself