Lately, the (LG) monitor goes to power save mode after boot up, just before the login page should appear. I can make the monitor work fine if I start in safe mode. I have spent a lot of time looking at similar problems online, I have removed the computer's battery in the hope that this was the root of the problem. I have returned the computer to factory state but the problem recurs when the antivirus has to restart to finish initial installation. I have removed dust from the interior of the case. I left it alone for a couple of months, then fired it up today. Everything was fine at first, I had to reinstall Kaspersky cos my subscription had lapsed in the meantime. When the message came up 'restart computer to finish installation' I duly restarted only to find I was back at square one and the monitor is going back to power save mode after boot up at the same point as before.