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Use VGA adapter to HDMI works for video
Sound is carried over stereo cable
What you are doing needs 2 cables
Video cable for video
Sound cable for sound
Using TV for monitor VGA to HDMI 32" at 120 refresh is best dot pitch .
over 32" dot pitch is lower may become grainy resolve place monitor away more from you when using over 32" TV 120 refresh is important
you need a cable. it may be the one that usually connects a computer to a monitor = depending what the input is on the projector but it sounds like an ordinary monitor cable as projector is VGA ( the other type has a digital input at one end ;but Im pretty sure thats not it.) If you have another computer set up just borrow the monitor cable and try it. There's already an input for one end in your laptop if its ok buy an extra cable
for vga out from your notebook to hdmi there are several adaptors on the market just google vga hdmi adaptor. they vary in price usually the sound and video a carried on seperate cables so you will have to check what extra cables you need.
looks like to video card is on its last leg now. if your computer has built in vga port, transfer the vga cable from the video card and see if the problem disappear. Or better if you have extra video card replace the old one and see if the problem remains.
Most likely its the video card problem, you can also try fixing the vga cable connected on your video card and monitor. It has two screws on both end that need to be fix.
i checked your problem and found that you open the cover of monitor and you find the two jack of data cable in main pcb and neck card( 2 connector of data cable).plz you cut the connector of data cable and you will find 8 wires in connector.related red(invild extra ground),green(invild extra ground),blue(invild extra ground),black gnd,white,orange,gold(extra gnd) and now you cut the red wire, you will find two wires.so you refix the main red wire pin no-1 of connector and red gnd pin no-6,green main wire pin no-2 and green gnd pin no-7,main blue wire pin no-3 and blue gnd pin no-8.check for the horizental sync and vertical sync wire you should go in main pcb which invild the other connector. there is present in print, h- sync(two wire of h- sync main wire in pin no-13 and other pin no-5) and ver.-sync wire in pin no-14.first you will check the whose h-sync and vert-sync in color and now finally other wires will fix any pin of connector.