Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great price if it works...

Great looking unit, great price. Didn't work. I tried various resolutions but the screen would turn blank after 2 seconds regardless, even though the power indicator remained green. Tech Support was pleasant but unhelpful. I guess I was unlucky as no-one else seems to have had this problem, but I'm going for refund ahead of replacement, just in case.