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This problem often occurs in samsung SyncMaster LCD monitors.
solution is open your look for the LCD monitor power supply module
(which have PCB connector to the AC power), on that board look for
capacitors, now look for broken one which upper part is bloated, like
the image below:
If you find a damaged capacitor as in the picture then you should replace it with the same value.
Either you messed badly with the system color profile management, or, more likely, the VGA cable is faulty or improperly seated. Try unhooking the PC end of the cable (and, if you got yourself a model with removable cable, also the monitor end), and hook them back again, seating the connectors gently but firmly and tightening the connectors' retainer screws.
Appears to be something in the connection. Check the video cable and pins on the video connector. Also verify the color settings have not been changed on the monitor. There should be an area where you change the RGB levels.
I am a technician-informatic. I have repaired about 60 Lcd Samsung
monitors with thees problems - not optimal resolution mode and dark
screen problem. So i decided to made manual how to repair lcd samsung
monitors.The repair process is very easy and simple 10-30min. does not
need a lot of experience in electronics and expensive instruments.
if you are interested check it.
Samsung monitor repair manual guide 710n,913v,510n more
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I'm sorry, but it sounds like you have a damaged LCD panel, and that can't be repaired. Check carefully to see if it's just the outer plastic that has cracks, but if the lines seem to be "electronic" colored lines you're probably out of luck.