LCD image looks melted and wavy, multicolored.

LED backlighting is found on the majority of flat-panel LCD TVs. LED lighting is brilliant, small, and energy efficient, but it has a cool color temperature that gives it a little blue tint. When seeing a white image, this feature is most visible, and when viewing other colors, it is considerably less noticeable.

Go into your setup menu and find the color mode. You can set the type of image filters to use.

Hello...The problem you're describing is related to the green lcd and most likely the main board(green channel). If the focusing removes the purple(you have *that* much dust in the unit?) then it *is* dust. You should be able to focus on the dust particles twice--dust on the front of the lcd and dust stuck to the back of it. I'm gonna give you the color table so you know what to look for and what you're seeing. Red LCD=cyan(baby blue) onscreen; Green LCD=violet(purple) onscreen; Blue LCD=yellow onscreen
If you have a lot of dust(and the green lcd usually is the main culprit by the design of the lcd panels around a glass "cube" internally) you might try blowing some air into the unit when it's cool. However, the unit probably needs a good cleaning--remember to clean the dust filter! To properly clean the unit, a trained tech will have to perform the job. The lcd panels are DELICATE and precisely positioned for displaying a sharp image.

REPLACE THE LCD LIGHT ENGINE

Projection TV sets have two very common problems listed below.

Problem #1) Convergence


These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony, Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer, Hitachi,Mitsubishi,Zenith and others.
You can get more information and a DIY convergenece repair kit with instructions from the link below.

Here are some of the most common problems with these sets...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2 - Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

This is due to defective ccd imager in your Canon A70 camera and ccd imager needs to be replaced to see correct picture.
Canon announced Free of Cost repair scheme for such problem in A70 model.
Click Canon CCD Advisory to get details.

Either a bad optical block or possibly a bad LVDS cable, you need a qualified tech to know for sure

According to many respected sources with far more expertise than myself, the symptoms you are describing also fall within the realm of Canon CCD failure. In Canon's Service Notice: CCD Image Sensor Advisory, they outline the most common symptoms (distorted images, LCD showing only a black screen, etc.). They have conveniently limited the description to the bare minimum. More symptoms of the failing CCD include: pictures appearing on LCD show up with severe color variations (pink-purplish or green tint), colored "streaks" or "lines" throughout pictures, and wavy distortions in image. Most of these symptoms include the color variations, but not always. The lines or waves can appear in any direction and with varying degrees of severity. Some LCDs do not go black, but turn totally purple. Here is a link to a very informative article that should clear up any questions you might have.
Digital Camera Repair Blog

If nothing else, call the Canon Customer Support Center at 1-800-828-4040. They will ask questions to identify whether or not you are having the same symptoms as described in the Product Advisory. I have been through this twice, and both times they were very nice and very helpful. Even if you don't qualify for the free repair, it didn't cost a thing to find out.
I hope this has been helpful.

If there are random colour streaks moving around it can be due to defective CCD imaging IC. You need a skilled workshop to replace this and we can get you the parts from SONY and service manuals.

I had this problem a lot on Labtops. The problem is that it has been unliquifed in the screen. This means that the screen has been damaged or has got really hot. Also its has been on for along time. LCDs go bad real quick and can be a hassle when you need the infomation in the thing and have no display. When I had this problem on my labtop, I used the external bay to use another monitor so I can work on it. So I say that nothing can be done to fix it. The only way to see your stuff on there is to use the video out on the recorder and try to check your stuff. That multicolor lines you saw is becoming major right now in LCD displays. I hope this solves your problem.