Oneday after shutting down(from power menu), monitor went off but CPU kept on. After that day weird stuff started.
- On startup, at first cpu fan starts spinning(for 1-2 seconds) and monitor shows "AOC" then "NO signal" then off. 2 seconds after that CPU finally turns on and goes to BIOS every time. (No POST beep)
- On shutdown(ALT+F4) shows "No Signal" but CPU kept ON. Working with long press shutdown of CPU.
- after sleep also monitor doesn't turn on and shows "No Signal", on disconnecting cable shows "cable not connected".