Having problems with your Mag Innovision LT776s 17" LCD Monitor ?
Display goes blank when brightness is above 70 percent
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\015 MAG 17 inch LCD\015\012\015\012Symptoms:\015\012\015\0121: Monitor bulb stays on for a couple of seconds when power is turned on (to monitor) or when the display setting are changed from the control panel (from second monitor, running dual monitors). Example: if I change the refresh rate of the monitor it will light up for a couple of seconds.\015\012\015\0122. I reset the monitor and this allowed it to stay lit for a small period of time but then problem returned. I then adjusted the brightness and found that the problem is related to this area. If I turn down the brightness below 70 percent it remains lit. \015\012\015\012The unit is about 11 months old. Is the bulb going bad? or the bulb controler?\015\012\015\012It is still under warranty so i should be able to have any repairs done for free. But the tech side of me wants to know what's causing this problem.\015\012\015\012Thanks for your help.\015\012\015\012Sincerely,\015\012\015\012Dean\015
\015\012\015\012The following is a generic answer applicable to most.
\015\012\015\012Two possible causes are bad capacitors or a bad light inside\015\012the LCD panel.
\015\012Open the unit and check to see if any of the capacitors in the power supply or\015\012other boards look domed or vented on the top.
\015\012Replace any capacitors accordingly. Use the same value capacitors. Most often,\015\0121000uF 16V or 25V, 470uF at 16 or 25V, 220uF at 16V or 25V.
\015\012If this doesn’t solve the problem, try checking the surface-mount transistors\015\012on the inverter board that run the lights. Some times these transistors go bad.\015\012Check the area for any cracked or overheated ceramic or mylar capacitors.
\015\012\015\012Also, you may have a bad light inside the panel. This is\015\012tough to test without a spare light to use for troubleshooting.
\015\012You can take the panel apart and inspect the lamps but it is very tedious. It's\015\012tough enough to get them apart and back together again never mind keeping the\015\012layers clean. You have to try not to get any dust between the layers or you\015\012will see it in the picture.
\015\012There are usually two light fixtures each of which holds two lamps. One fixture\015\012is at the top and one at the bottom. Remove them one at a time and inspect the\015\012lamps to see if any are broken or very dark on the ends. If one looks out of\015\012place, it could be bad.
\015\012You'll have to find replacement lights on the net. It's not easy to replace\015\012them, but if you've gone this far, good luck. You should be able to get generic\015\012instructions off of the site that sells the lamps.
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