Repeatedly change color display

Digital China's F708C, spent 3 years,
recently on display is always a color repeatedly for no reason, no use for graphics, will be issued a blue and red for a while, the past two days, not a red, red Into the black, hand-patted and normal, a period of time has changed, the change is not stopped law, you help me! Zaban this issue?

Na Quxiu display it! The situation more complicated, and certainly where the bad, there is something wrong with the picture tube of it.Before you re-install data lines.To be able to clean the computer where you look at the sweep, the CRT is not the issue now.Display for internal welding machine Kai-point solder, look for professional maintenance.Should not be a bad element, is looking to open some of the trouble spots of the welding.I like you, have repair problems, not the Zaipai, or even more trouble.