I need your help.
Until today my pc was okay (..it used to freeze sometimes , but at least it was working), but ... TODAY when I switched it on there was no display on the monitor. All the LED lights on the CPU and the monitor were glowing but there was no display. In addition, there was one thing odd that happened... When I switched it on, three quick beep sounds came from inside the CPU. I don't know how (and what) to fix.