Hi. fan keeps turning,but screen does not power up, Display does not power up,checked hard disk,Ram.

[leo.mantsho]

fan keeps turning,but screen does not power up,Display does not power up,checked hard disk,Ram. sometimes everything it works normal. The machine is Fujitsu Lifebook U series

 

[zoltan.boese]

Is your monitor cable pluged into the motherboard or the graphics card? What is your preferred video output in BIOS? You may have to disable the onboard graphics controller, read here https/forums.anandtech.com/threads/making-sure-bios-pick-stand-alone-gpu-over-on-board-integrated-graphics-output.2135886/