Remote worked fine for several months, then it stopped turning on by pressing power button once. I have to press the power button at least three or four times now to power it on. I changed the batteries, but that still did not work. I also synced another 4k+ express remote for another 4k+ express that I own, that did not work either. The strange thing is I only have to press the button once to turn it off. All other functions work fine. Please help.