recently bought two Herpstat intro+, the one on my T8 is perfect, however i just tried to plug in my second one and once i changed the temp: dark. unplugged and plugged it back in: nothing. UGH. anyone deal with something like this before? seems very odd; google can't find something like it. any troubleshooting advice? if i can't find a fix i plan on contacting Spyder, but i've had such bad luck with new purchases i'd rather find a solution!