I have a tower computer and it works fine until today. I recently bought a television and I hooked up the computer to the telly via HDMI. I left the computer on sleep for a short while. I came back and moved the television with the HDMI cable still in and the computer still on sleep. I took the HDMI cable out and then when I placed the television back down after picking it up I put the HDMI cable back in and nothing displayed on my television as I took my computer of sleep. I held the power button to restart the computer and now it just turns on for about 4 seconds and turns off going through this cycle forever. What can I do to fix this? Thanks!