I just solved a mystery with the right USB or HDMI/Displayport or Ethernet or 3.5" jack of Fujitsu Lifebook E558 going suddenly dead.
I realized i had 6 pieces of the same model with the exact same issue, nothing on google, neither schematics so i had to dig in my self and provide feedback here in case someone else has the same issue.
I found out that the USB daughterboard is connected to the mainboard with 2 wide and non bending flex tapes that are 2mm longer than they should and this results in a constant pressure on flex connector and therefore eventually it cracks...
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