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Connect VGA (D-sub 15 pin) cable from PC to TV (RGB PC) input jack. Connect audio cable from PC to TV. Set screen resolution on PC to be compatible with TV, such as 800 X 600 or 1024 X 768 etc. Select on the TV, the PC INPUT using the TV remote when ready to use as monitor.
Under PICTURE on the TV select SCREEN (RGB-PC). You can AUTO-CONFIG or you can set resolution manually to the same you set PC to. Other adjustments can be done here as well to get optimum picture on TV from PC.
Reading the online manual -
You should have the laptop connected by VGA - PC input
VGA Connection
you need to select the correct input on the TV
Select the RGB-PC input source on the TV using the INPUT button on the remote control.
you will need to set the laptop up to output to the VGA output, to do this - varies by different manufacturers - But often F4 or F5, with the FN key selects the VGA output - have a look at the F keys across the top of the machine and see if you can see a picture of a screen - then use the FN and that F key together to toggle between display
it will change to <Laptop Screen Only><Laptop screen and VGA output><VGA output only> not necessarily in that order.
This is the support site for that TV
http://www.lg.com/us/support/product/support-product.jsp
direct link to the PDF user manual
http://www.lg.com/us/support/product/support-product-profile.jsp?customerModelCode=37LG30&matchedModelCode=1000003995&searchEngineModelCode=37LG30&initialTab=documents&targetPage=support-product-profile#
I've encountered that experience before it needs some technical knowledge because the raster for rgb on your lcd is going bad and the video signal out put cable is mis aligned get someone to re align the raster and your video signal output cable
I had same problem, adjust settings on your computer desktop resolution to 800x600 solved my problem right away, computer resolution is probably too high. Hope this helps!
You need to change the input signal, get into the menu on your monitor and change the signal from rgb to dvi, hdmi or vga dipending on what cable you using for connection.
There is NO rgb connector on that monitor
Had the same problem. My TV must have been puht onto RGB input. So I plugged my computer in to the RGB on back and turned on the TV. It stayed on. Then switch it back to input of choice
Cable TV: Connect the LCD TV to the cable with CATV and Digital cable. Preset the cable TV channels into memory with Auto Scan function when using a cable TV system. Make sure you set the INPUT SOURCE properly (TV, VGA, S-Video, etc)
Try changing the resolution on you computer. That TV may not handle the current resolution setting. You may also have to do something on your computer to turn on the rgb output.
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