Display some flash, like a voltage instability, one will become a dim light, …

I bought the second-hand CRT monitors, as if older, who know the situation or face the same problems you back

May be a problem in the secondary display.Buy a new Display is no problem.First of all, look at the display interface is not loose, and then consider the display settings, and set up computer problems such as the general set to 85Hz refresh rate, or with high! No longer, it is possible for you to display the picture tube caused by aging, and repair to the TV to see it!