My Monitor Keeps Turming Off My Computer Monitor Keeps Blinking What Do You Think Is Wrong With It?

My computer monitor keeps blinking what do you think is wrong with it? - my monitor keeps turming off

Whenever I am on my computer monitor flashes on and off. Sometimes I chop up my computer, just to continue to use. Do you think you can do something for me just fixing the cable from the computer, or you really need a technician. ? look