Question about ViewSonic G790 19" CRT Monitor

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

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Re: screen problems

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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My LCD screen stopped working. Playing a game when the monitor was blackened. This time the screen is black. If I start the monitor, the led is orange, if I connect to my PC led color turns green but does...

victorash02, Is screen black n blank, or just black? Do flashlight test! Yes it could be both! Most likely problem with unit's internal "switch-mode-power-supply"/"CCFL inverter supply". You or technician will need to investigate for probable cause of black screen of death. Need a little history of unit! Did it work just fine 2 weeks ago? How many "ON" hours of use on the unit? When was it made? Did you PROVE that PC not cause and works ok? Get back here with more info so we can help.
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I had same problem.
Narrowed it down to C637 on logic board.
Replace C637 or logic board.

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I had the same problem with my two LCM-19W4 monitors. Both failed within two months of each other. Radio Shack stocks 220uF 35V capacitors that work fine for this. You have to pay $1.49 ea though.

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It's seems your monitor went into hybernation... Hehehe... Just kidding! :) Actually, you got a burnt out backlight inverter. It's time for a replacement. Good lucks, have a nice day!

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Screen not appearing straight away

It could be your LCD backlight giving you problems till it warms up. Turn you computer on and while the monitor is displaying black and the power LED is green shine a flashlight in the lower left hand corner of your screen. Look for the ?Start? button, if your backlight is not working you?ll see a faint ?start? button if you look closely. A 15" LCD monitor is probably not an economically repairable problem unless you have access to really cheap parts and have the skills and tools to do the repair yourself.

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"pee...eet" sound several time after switching on

Well like you I am a little bit green on this level of 'Electrontrickery' My best bet would take it to an 'old fashioned TV repair shop It seems that the problem lays in this level of expertise- What i was a little wary of in CRT monitors/TV's was the high voltages around in the Line Ouptut Transformer areas- very nasty.

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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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