CxOs will continue to ask the CIO to fix their laptops if they perceive the CIO as the person in charge of the people that fix laptops.
So the first step for the CIO is to appoint an IT manager to do the job of IT management.
And then to behave as if they were a customer of the IT department and not the head of it.
At the next board meeting The CIO should make a point of comenting on a problem she is having with her laptop and how the guys from IT were quick to get on the case thanks to the new IT manager.
The CIO can now get on with the job of digital leadership which of course is not the same as IT management.