If not muted, check the speaker/s. If found OK; check and replace the damaged component/s at its audio output section circuit board. If needy, replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. Surf the site with patience.
http://electronicshelponline.blogspot.com/
Search the site by type in the "brand name" to your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.
This is usually caused by a cable not completely plugged in on either end - computer or monitor. I would check that 1st. If not, try a different cable, that would be the 2nd choice.
Does it make the noise when its not plugged into VGA on computer? If it stops whistling, try a different computer. If same result on both computers, contact Viewsonic tech support or me. thanks
Most monitor problems are caused by bad capacitors on the power supply boards inside. You can open up the monitor and look for capacitors that have bulging tops or leaking/brown residue on top. The capacitors are the pop can shaped components. capacitor Google Search
Try 1. Unplugging the video cord from the back of the computer (and screen if it comes off) and plugging it back in. Sometimes it can become loose and cause a screen to have a abnormal color contrast 2. Updating the drivers to your card 3. Trying a different monitor on the computer. Mind you, if you plug in a differant monitor and the color stays the same. Check the videocards pins on the back of the card. I dont know if you gave all the info on how it became like this, so maybe it got undone and plugged back in forcably and one of them got bent? I Also if the pigment goes away. Plug the normal one back in and if its gone, great!, if its back. Try the OSD settings on that monitor. Still no luck. The monitor is junk.
From what I know, you cannot adjust the monitor at all. If you read the reviews on Amazon you will find that most folks are sorry for buying this monitor. what you can do however is to buy a desk mount (with a arm) and that way you can adjust the screen any way you require. Hope this helps a little
In some cases the unit has heating issues cause the solder on some video chips to heat and the chip will move away from contacts. Re-flowing a chip is what fixes that issue; however, it is dangerous if you do not know what you are doing.
There are some times when the chip is pushed out of a socket set on your board. I have provided a video about the issues commonly found to assist you in making a decision on how you want to approach the fix.
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Best option is to use the HDMI connector to connect the DVD player (assuming your DVD player has an HDMI port). Then make sure the monitor is set to accept the input from the HDMI port.
