Question about ViewSonic G790 19" CRT Monitor

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Screen problems i turned my computer on and its jumping.just a little though.it just started doing it a couple of hours ago

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  • 123 Answers

Check TRC heater voltage (6,3 V., pins 3-4 of TRC socket counting counterclockwise) when picture goes off; if there's no voltage but it appears when picture comes back, look for bad solder joints tracing the circuit backwards to the power supply. Usually, the 6,3 V. tension comes from a single diode-electrolitic cap circuit at the secondary of the power supply transformer.or check this
Pin assignment for a monochrome 9-pin D connector are:
1, 2: Ground
3, 4, 5: not connected
6: intensity control (contrast)
7: video signal input
8: horizontal sync.
9: vertical sync.
Video monochrome cards usable are:MDA (monochrome display adapter) HGA (Hercules graphics adapter) -Some CGA (Color graphics adapter) and EGA (enhanced graphics adapter) cards that have a switch mono-color can also be used.

Posted on Jan 26, 2008

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Posted on Jan 02, 2017

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My '92 Trooper just started shut off and won't start. i had to clutch start it. It crank vigorously but wont Start . A few wks ago. I stated it and shut it off as I had to do something before I go and it...


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Jumpy color changing screen with slow speed. Please HELP!


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Problem when turning monitor off


mcdevito75 here LCD, or liquid Crystal display, chances are the crackling is the inside liquid display trying to capture the in comming electricity to make a display picture. Remember even an LCD is nothing more than a light bulb, a very intricate light bulb but a light bulb, and you have light bulbs burn out when you put them on and almost never as the are on burning. Turning the monitor itself off won"t really save electricity or the monitor itself as, when you shut down the computer from Start (left side of screen) the monitors screen saver comes on for 10--20 minutes then goes off, at this point the electricity is at the monitors on/off switch and not going thru the monitor at all. If you turn the monitor off at it"s on/off switch, the sudden jump of electricity to the monitor from it"s on/off switch could hurt it, or even the switch. I have a friend who turns off the monitor also and that friend had a bad monitor in 3 years. I never turn my monitor off just the computer itself. I'd speak with a Radio Shack, Staples, Best Buy ETC. for more advise. Me I;d say leave the monitor on. Hope this helps.

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1 Answer

Problem with display


It sounds Heat related. As the monitor heats up, it begins going crazy. Maybe unplug and blow out with compressed air.
Hope this gives you some ideas.

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