Every time i turn my camera on there is a black screen that says access and the zoom lens zooms in then out, in then out. constantly whether no buttons are pressed.

1. In many apps, you can zoom in or out on specific items. For example, you can double-tap or pinch to look closer in Photos or expand webpage columns in Safari. You can also use the Zoom feature to magnify the screen no matter what you're doing. You can magnify the entire screen (Full Screen Zoom) or magnify only part of the screen with a resizable lens (Window Zoom). And, you can use Zoom together with VoiceOver.

1. Go to Settings > Accessibility > Zoom, then turn on Zoom.
2. Adjust any of the following:
   
   • Follow Focus: Track your selections, the text insertion point, and your typing.
   • Smart Typing: Switch to Window Zoom when a keyboard appears.
   • Keyboard Shortcuts: Turn on keyboard shortcuts to control Zoom.
   • Zoom Controller: Turn the controller on, set controller actions, and adjust the color and opacity.
   • Zoom Region: Choose Full Screen Zoom or Window Zoom.
   • Zoom Filter: Choose None, Inverted, Grayscale, Grayscale Inverted, or Low Light.
   • Maximum Zoom Level: Drag the slider to adjust the level.
3. If you use iPhone with a pointer device, you can also set the following below Pointer Control:
   • Zoom Pan: Choose Continuous, Centered, or Edges to set how the screen image moves with the pointer.
   • Adjust Size with Zoom: Allow the pointer to scale with zoom.
4. To add Zoom to Accessibility Shortcut, go to Settings > Accessibility > Accessibility Shortcut, then tap Zoom.

1. Double-tap the screen with three fingers or use accessibility shortcuts to turn on Zoom.
2. To see more of the screen, do any of the following:
   
   • Adjust the magnification: Double-tap the screen with three fingers (without lifting your fingers after the second tap), then drag up or down. Or triple-tap with three fingers, then drag the Zoom Level slider.
   • Move the Zoom lens: (Window Zoom) Drag the handle at the bottom of the Zoom lens.
   • Pan to another area: (Full Screen Zoom) Drag the screen with three fingers.
3. To adjust the settings with the Zoom menu, triple-tap with three fingers, then adjust any of the following:
   • Choose Region: Choose Full Screen Zoom or Window Zoom.
   • Resize Lens: (Window Zoom) Tap Resize Lens, then drag any of the round handles that appear.
   • Choose Filter: Choose Inverted, Grayscale, Grayscale Inverted, or Low Light.
   • Show Controller: Show the Zoom Controller.
4. To use the Zoom Controller, do any of the following:
   • Show the Zoom menu: Tap the controller.
   • Zoom in or out: Double-tap the controller.
   • Pan: When zoomed in, drag the controller.

While using Zoom with Magic Keyboard, the screen image follows the insertion point, keeping it in the center of the display. See Use Magic Keyboard with iPhone.
To turn off Zoom, double-tap the screen with three fingers or use accessibility shortcuts.

You have a problem with your lens, maybe a decentered lens. Make sure there are no obstructions in the way of the lens. It may need to be serviced.

Typically means you have a jammed lens movement. Sand from a beach perhaps, or worn out. Get a replacement. Not worth the time.

Hey,
It sounds like you're having the same problem,
Here is a link
http://www.e18error.com/repair.html

It may be usefull,
good luck mate!

If you have some skills, you can open the camera and cline your zoom lens with toothbrush and compressed air. Try to separate zoom lens from the electric motor. usually is 2 or 3 screws. You will see a lot of sand inside the camera and lens. And next time when you will go to the beach, you will take more care about your camera.
Solution 2, and more easy is to buy another zoom lens from ebay.Or another camera same model with broken LCD or other technical problem than zoom lens.

Zoom motor in lens assembly is jammed and you need to replace complete lens assembly. DSC-T1 is an old camera so oes not worth to repair.

It may have jumped a tooth, something like a car timing chain. The Zoom in this camera is a barrel that has 3 cams that rides inside another barrel that has "tracks" for the cams. The motor rotates the the outer barrel via gear teeth, forcing the inner barrel to extend or retract. There is a tab on the gear teeth that might index the position of the zoom lens. If this tab is in the wrong position, if the gear jumped a few teeth, the camera may not know where the zoom lens is in relation to the inner focusing lens, and cause the "zoom error" If that is the case, I can help you get it back into position. This is a theory, but does explain the tab on the gear and the constant zooming.

Try turning the power on and gently pulling the lens outward as it powers up. This may force the gears to re-align themselves. Use "fingertip" pressure only. Don't force it excessively. Also try turning on, and then applying slight pressure to the front of the lens while you power it off. You can also try rotating the lens barrel segments while it powers up or shuts off. Sometimes either can get the lens back on track.

You have a one year warranty with Canon, you should have all the information about shipping it to them in your original box.

Lens unit has to come out to see whether the problem can be sorted out without spares going in. But unfortunately you have to go from the back on this model which means disconnecting and removing all 3 pc boards and the LCD screen and then loosening the lens mounting to slide the lens out from the back. You may have to dismantle the free lens further once it is out to see exactly what the damage is ( if any ).