I have been using my computer for three or so years, working without an issue. One day it just turned down and since than it makes nothing, just the power LED light blinks every 3 seconds, nothing happens when pressing the power or reset buttons, no boot, nothing, just this blinking every 2-3 secs. I have tried to unplug and plug all components, HD, RAM, etc. and it started once again but next time it happend the same and now still only blinks, doing nothing, nothing happens when pressing buttons, only when I turn the power off few seconds after I can hear very weak sound near cpu and the cpu fan shivers just a little bit as the power goes away. When I turn the power on, it only starts to blink. I have tried to change RAM but no help.
Any advice is much appreciated!