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Please try to connect other monitor to your CPU.because I know the problem is in your video card graphic.also change your screen resolution to 1024 by 768.
if same problem again. need to check-up your viewsonic p75f+ crt monitor. some parts of your vertical video section capacitor leakages.
Failing internally, unless you suspect the cable or graphics card? Repairs are possible, but unlike the older CRT monitors, expensive and sadly uneconomical. CRT screens do go over time and the loss of a colour channel is usually the 1st sign it needs replacing
This can happen if you somehow changed the input setting. Make sure to check the "Input" setting on the on-screen menu and make sure it's set to the proper type of input (HDMI/Digital or D-Sub/Analog) for the cable you're using. If that is correct, and you don't get an image, then you should also try to connect your monitor to another computer using another cable...because it actually may be your computer's video output, or a bad cable, that is the problem, and not the monitor.
If those checks don't solve the issue, then yes it may be "done."
This link will provide you with a user manual for your monitor to assist with the on-screen menu selection.
Hi, well if this is the inverter board, then its probably more cost effective to buy a new screen, same thing if this is the cathode lights. Reason for that is the technician will charge to replace, so cost will get anywhere from 50 and up. Only one question, how many years old is it? I do believe Viewsonic has 3 year warranties.
Problem solved! The main power thingy (the thing with the big red wire coming out of it) was all black and dusty. There was 'soot' all over the whole insides of the monitor. I concluded that this monitor should be laid to rest, and a new flat-screen monitor erected in its place.