I have mac 4400. from this morning I cant turn on it. When I press power button there is nothing, not a sound. I suspect on hard drive problem, because I know that is almost completely impossible that I got some malicious software I am very cautious: I dont open mails from unknown people, never download pictures or other stuffs. What do you think?
I am almost sure that you have a p[problem with power button. Sometimes plastic part inside can break. You can carry it to someone to fix it and just to be sure that Im right open it and try to turn on it by pressing motherboard button. If your computer start, then its the button. But if dont then its the backup battery.