The screen when switched to on says pano and the battery power, and wont do anything else.

The first thing you can do if an error occurs with any camera, is switch it of. Check no light is burning or flashing. (this means the camera is still accessing the memory and switching off will damage the file system) Then remove the battery. Wait a few seconds and than reinsert the battery. This will force the camera to start from scratch.
While the battery is out, toy also can check if the memory card is inserted correct an if all contacts are still clean and shiny. (battery and memory contacts, the ones in the camera too)
Cleaning of contacts, only with a dry cloth or cotton swab(s). Never use anything sharp in or close to a camera.
I wish you luck.

What makes you think, your camera is on? Could it be the battery is empty, and your camera is not working at all? did you try charging the battery in an external charger?
Did you check the contacts of the battery and in the camera?
Don't clean contacts with anything sharp. Just a dry cloth or cotton swabs will do.
What was the last time your camera worked correct?

A dead camera is impossible to tun diagnostic checks on without specialist tools, so yes, your camera will need to go to a Canon service centre for diagnosis and an estimate. If you decide not to go ahead with the work then you'll be charged for return shipping and a fee for the work carried out to make a diagnosis.

If the warranty expired fairly recently, then it may be worth contacting Canon before getting the estimate: it's not unknown for them to offer goodwill repairs for major faults which occur prematurely, but you need to be aware that your model was only designed with an approximate four year minimum lifespan.

hi...ensure that the camera is turned on. If applicable, ensure the lens cover has been removed before taking pictures. the LCD backlight is turned on by pressing the DISPLAY button several times until the screen appears. Depending on the camera model, the DISPLAY button may be labeled as DISP or with a display icon. This button could be a standalone button or it depends upon the camera model.....
If operating the camera with a battery, ensure the battery is fully charged.
Ensure the battery is inserted properly in the camera.
If operating the camera with the power adapter, ensure it is plugged into a working AC outlet.
Ensure no Audio/Video (A/V) cables are connected for viewing pictures on a TV; the LCD screen will not display when an A/V cable is connected.
Perform a reset procedure on the camera....

Here are some simple things to try first for a camera that won't power on. They won't work for every case, but they're worth a try:
http://camerarepair.blogspot.com/2007/11/simple-fix-for-dead-cameras-that-wont.html

Just fixed mine, if the lens is out that's the problem we had, it was jammed and not allowing it to switch on, we gently pushed it back in, then switched on, the lens came out a bit then jammed, pushed it in again & kept doing it until it cleared the blockage.  
Works fine now!  
Hope it works for yo

Get Rechargable batteries with charger of good company and try it. Your problem is discharged/ outdated batteries.

MY CAMERA IS HAVING TROUBLE TURNING ON. THE OTHER DAY I TOOK A PICTURE AND IT SHUT OFF IN THE MIDDLE OF IT WITH THE ZOOM LENS OUT. NOW WHEN I PRESS POWER IT SAYS RETRY POWER ON OR IT WONT DO ANYTHING AT ALL. THE BATTERY IS CHARGED ALSO BUT NOW I CANT USE IT AT ALL

HELP!!!!
WHAT DO I DO!!!
STACY

lol ne too BUTT I FIXED IT :p

lol just ajust the battery to one side (slide it over as far it wont seem like alot but it will work) .



GOOD LUCK

Be sure to fully charge your batteries if rechargeable - at least 14 hours. Check that your card door is closed good - it's common for the latch to break. There's a switch at the top of the door that has to close before it'll turn on.