Hi. Could someone please tell me what is the matter with my PC. A few months back it decided not to boot up. The orange light flashed constantly, I tried everything, turn off for mains power and removing cables etc. I even hoovered the round the casings and as much externally as I could. Then when I tired again it booted up and worked for three months, now the same thing is happening again. I have to spent an hour or so turning pressing the button on and off in hope it will boot up. It works fine once booted up, but if you put it in hibernation mould or turn it off, I have to go through it all again and to be honest sometimes it takes a whole day to get it to boot.