I have a Mag Innovision PF-786 17" monitor, the other day I looked at it and the green power light was flashing and it had a black display. I tried to turn it off and then on again and it won't even turn off, the power light just flashes green with no display or reaction on the monitor.
That usually means that the connection between the PC and the monitor has been interupted- check that the cable (probably has blue ends) between the two is firmly connected, and power it back up. If that doesn't work, you have one of three problems; a broken VGA cable, a broken monitor, or a broken video card.
Finding out which- you'll actually need someone tech-savvy there to help you figure that out. Try plugging the monitor into a different computer. If that fails, use a different VGA cable (cables are pretty cheap at monoprice.com), and if that fails, it's your video card.
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There could be a problem with the picture tube it could be dead( shorting) or the tube Transformer s damaged another course of this could be at the Horizontal section ie a Transistor or a Diode could be shorted . Pls tell ur Technician to check all this . Lastly Buy a new Monitor .
When I turn on my computer the monitor takes a long time to warm up and colors change and vertical lines flash across the screen from right to left before the screen becomes normal again. Now the power light even goes out upon turning on my computer and I have to unplug the video cord and plug it back in to start the screen back up which even takes longer.
Sounds like an inverter problem. If the power supply is internal replace the capacitors coming out of the voltage regulators. These are usually 1000mf and/or 470mf. If that doesn't do the trick look up the numbers on the 8-pin chips that drive the secondary transformers on the inverter to see if they are getting the right voltages. Good Luck!