You're the first person on the internet that I've found that seems to have the same experience as me with the HY losing its settings. For me, if it goes unpowered for, say, two days, everything gets set to gibberish values (usually 65535...i.e. all ones) and I have to reprogram everything. Huanyang keeps having me try different settings but it seems silly at this point to try different settings when nothing sticks.