Hello Guys,
I replaced the powersupply: the PC made a different noise, but no display.
I replaced the videocard and there was light!
It didn't start up and after running al kinds of different "repair" programs (checking the SDD etc), I decided to use an old "Acronis" backup.
The PC runs now, but hase some strange habits....
During start up, it finds two Windows 7 operating systems (only one is available and installed). During setup you can choose one of these two. It doesn't matter, wich one you chose, it starts booting, and the system is running.
A second thing is that no updates are found (and installed). I also tried all kinds of "repair" software (fix it etc), but nothing helps.
Any ideas?