So I've hooked up my hp laptop to my Philips smart tv and after connecting and holding the image on the screen for a minute or less, the image disappears and my tv goes to black screen with the little white box thay says "No signal". I've hooked up my laptop to the tv before and it worked fine but now it keeps losing connectivity after a bit. I've unplugged and replugged the hdmi cord and even tried it on the other three slots but nothing works. Is there anything else I can try?