I picked up a cheap used pool and it came with intex Swg with built in filter. 2000 gph I'm pretty sure. I turned on pump and its pumping and filtering but the screen/LCD is blank. After running for an hour or so I noticed working light was on which should mean swg is working but I have no idea what amount of time it's set for. Been trying to watch for light to come on again but haven't seen it on again. Should it come on about same time every day? Thanks.