<human>:  How do I fix a broken computer monitor?
<bot>: Firstly, you will need to unplug the monitor and take off the back cover. Then, you will need to check for loose connections including the power cord, display data cable, and video cable. If any of them seem to be loose, firmly reconnect them. If the connections are secure, you may need to replace the power source. If this does not fix the issue, it is likely that a component inside the monitor has become damaged or faulty and you will need to contact a professional repairman or computer technician to resolve the issue.