Does not turn on

Try these procedures.

May be there is some spec of dust stuck in the lens well. You must use your vacuum cleaner to pull out the dust from around the lens housing while powering the camera on and off.

Lines across your pictures or pictures too bright are due to the shutter not closing correctly or at all.
to check this- turn camera on, turn off flash, turn camera around and look into the lens. Adjust the zoom so that the shutter and internal lens comes up to the end of the lens and whatch as you take a picture. You should see the shutter close completely over the lens. If it doesn't move or does not close over completely then there is your problem.
If camera was dropped it could have jammed the shutter open or obstructed it in some way from closing completely.
camera will require repair/ service.
You may have some luck if you power up and down your camera numerous times before taking a picture. The action of the lens opening and closing may free the shutter.

In My case, the lens was coming out part way a start up and pulling back in without camera coming on. Some times the screen would stay a dark blue and could not be shut off. Ensure batteries are new or remove and replace existing. Lens will come out part way and retract when the battery door is opoened and closed. Press "on" button and as the lens comes out touch and hold the lens, with a finger placing pressure on the side of the lens. The lens will stay out. With camera upside down blow into the sliding mechanisms of the lens. Grip the furthest most extened lens with two fingers and pull the lens all the way out with steading pressure. The pressure should be equivalent to lifting one to two pounds of bread with two fingers. Perform this with the camera upside down so that any dirt particles can fall out. A slight rocking (side to side motion) of the lens may help. Once fully extended, open and close the battery door. The lens should retract. Turn on the camera. A couple of ideas relatd to this problem 1) If the concentric circles of the lens are not even, this could indicate a large grain of sand. After lens is extended or partialy extended push the lens on the side where the largest gap is while the camera is upside down. This may provide a larger gap for the grain to fall out. 2) Dirty camera case. I turned my camera case upside down over a piece of white paper and was amazed at the particles of sand that fell out. I turned the case inside out and completely brushed and vacuumed the case.

to open them completely simply push them with your finger. try doing so also when closing them. i have the same issue sometimes.

Lens errors are fairly common. Usually it's sand or grit interfering with the lens extension mechanism. Or the camera's been dropped with the lens extended. Or the camera has been powered on, but the lens had been blocked preventing its extension. Or the battery ran down with the lens extended ...

Here's some things that you can do to try to correct it. They only seem to work for less than 50% of the lens errors, but if the camera is out of warranty, they're worth a try:

http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

My Z1275 was off with the lens open. When I turned it on, the lens moved a little, the screen came on
for an instant, and then the camera off.

Here is what I did to "fix" it.

I turned it on and helped the lens (gently) close while it was moving. It closed and the camera came on.

It must have been dropped and slightly bent in such a way where the lens could not close.

Good Luck!

This is probably THE most common failure among digital cameras. There's a halfway chance of fixing it yourself, described here: http://camerarepair.blogspot.com/2007/12/fixing-lens-error-on-digital-camera.html

Try the procedures in this tip.

The batteries need to be changed. The digital batteries sold at the stores die out too fast. I had this same problem. In result, I purchased rechargeable battieries.