I’ll try and explain the best I can. Came in on Sunday evening to find the computer in sleep mode. Went to wake it up by moving the mouse as usual and nothing happened, even after several attempts. So I pressed the on button briefly, nothing, tried that a couple of times, still nothing. Also tried touching a key on the keyboard, but it seems nothing was working, so in the end I pressed and held the ‘On’ button in until the computer switched off. Gave it 20 seconds or so, then pressed the on button and it fired into life. However it now had 4 lots of vertical lines equally spaced across the screen, these lots consisted of the same amount/pattern of lines. I worried a little bit, so opened CCleaner and used that, and then shut the computer down properly. When I powered it up the next time the shortcuts on the screen had moved themselves around, as though the ‘resolution’ had been messed with. I looked into that and everything looked fine. After a few attempts to get it working properly, I gave up. Next day, same thing etc etc etc. On the night, I unplugged everything and gave everything a good clean/dusting and re-seated all the components, just in case something somehow had come astray. Unfortunately this did not solve it. Now I’ve either got these vertical lines or lots of dots all over the screen. Having tried a couple of things, I’m now lost as my knowledge isn’t that good unfortunately. The computer now seems to lock up when I try to turn it on properly. It only works in Safe mode. Can anyone offer some kind of advice as to where to start?