Generic Non-PnP Monitor

Basically it just keeps disconnecting and reconnecting all the time. I am unable to use the pc properly because of the constant blinking and flashing caused by this. What should I do?
 
Replace existing parts with 'known good' ones until problem stops: power cable, power connection, data cable, data cable connection, monitor, video card, etc, etc. Take your time, be thorough, keep notes.
 
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