I may be the last one to know but in case I am not we had a lightening storm a few weeks ago and I went quickly to the computer and pulled the plugs out without shutting down. When I tried to open the computer the next day the screen was black. I called the manufacturer's tech support. They told me to disconnect the power cord from the wall, not just the surge protector and commence to push the start button on the CPU for 15 secs. off and on, off and on, etc. I thought I might be on candid camera but at the end of 15 secs when I plugged it back in. It worked!