Looks like the Monitor is short of a driver.
If you did a clean install the all the originals driver cleaned out.
The system will run on a default /generic settinf bot to get the monitor to run properly you will need a driver.
Go to control panel/system/hardware/display[or monitor] and click driver- Windows has a library of device drivers- you may find the exacy one or one near enough to do the job.
Failing that the moniot manufacturers web site for the latest.