Will not stay turned on. Power snaps, screen goes black. Snaps and comes back on. cycles.

The energy saving feature might be turned on. Search for the turn off energy saving settings on your TV's settings to have the TV quit adjusting the brightness.

It is definitely a circuit problem tf
it could be the pip board and or
components on or around it.would
require technical knowledge to
repair

Ebay lamps can cause this as they are not originals also the balast supply, is gas discharge type, can fail.

this info is in the owners manual. the panel where the power button is in front is removed and snaps off and there is a door behind that allowing access to the lamp.

It just un-snaps. Pry gently along the top or bottom edge and work it off with a plastic putty knife. Snaps pretty good and sounds like it is breaking.
Eric

Did the set just turn off and stay off? Has the set been turning itself off and then back on before this issue. If you push the power button, does set set cycle on and of 3 times?

If it just went off and stayed off, the first thing I would check is the main fuse near where the power cord goes into the set. You'll have to take off the back and then unscrew and unclip the plastic cover in the back where the various inputs and out puts are. Looking down after removing the plastic cover you'll see a glass fuse that snaps onto the board. Check and replace that fuse if it's bad.

If the other symtoms I mentioned happen then it's most likely the HV splitter up in the front part of the set.

This definitely sounds like a defective CCD imager. If so, Canon should fix this for you for free, including free shipping both ways. This is regardless of your camera's warranty status. Please check the following links for more info:
http://camerarepair.blogspot.com/2007/11/canon-digital-cameras-showing-black.html

Here's the official advisory for Asia. You should search www.canon.com to find the local repair center in Bangladesh:
http://www.canon-asia.com/index.jsp?fuseaction=support&prod_type=image-phenomena_notice

Applicable cameras include:
A40, A60, A70, A75, A80, A85, A95, A300, A310, S1 IS, S60, S200, S230, S330, S400, S410, S500, SD100, SD110, IXUS V2/300/400/430/500, IXY Digital 200a/300a/400/450/500

I would guess to say the tuner for the pip is bad.

Most likely the main power supply is defective.