My TV was working fine, and then I tried to switch from HDMI1 to HDMI2 and got a "no signal" message. I then tried to switch back to HDMI1 and got the same "no signal" message there too, although it had just been working. Now I can't seem to get anything but the "no signal" message. The TV does flicker for about a second on occassion showing me a picture. I can't find anything online about this issue.