Canon PowerShot SD790 IS Troubleshooting

Camera won't work ¶ 

No matter what you do, you can't get your camera to turn on.

The camera is not on ¶ 

Before delving into the guts of your Camera, hold the power button down.

The memory card slot and/or battery cover is open ¶ 

Ensure that both the memory card slot and battery cover are closed.

Drained or bad battery ¶ 

Replace the battery or plug the camera in using the AC adapter to charge the battery.

The battery has poor contact with the terminals ¶ 

Remove the battery, so you can clean the terminals. Replace the battery after cleaned.

The LCD screen is malfunctioning ¶ 

It is possible that your camera is turning on, but the LCD is still showing a black screen. The display will need to be replaced. To do so follow our guide to replacing the LCD screen.

Lens does not open ¶ 

Add new batteries ¶ 

Remove batteries for a couple of minutes and add a fresh set and turn the camera on. If that doesn't work, try pressing and holding the Function or OK button while turning the camera on.

Remove batteries and memory card ¶ 

Remove batteries and memory card. Then, install new batteries, and turn on the camera.

Insert the cameras Audio/Video (AV) cable ¶ 

Insert the cameras Audio/Video (AV) cable and turn the camera on. This will ensure that the camera's LCD screen remains off during the start process.

Press and hold shutter button ¶ 

Place the camera flat on its back on a table and press and hold the shutter button down. At the same time press the power-on button.

Blow compressed air ¶ 

Blow compressed air in the gaps around the lens barrels. This is done to blow out any sand or grit that may be in there jamming the lens.

Tap the padded/rubber USB cover ¶ 

Tap the padded/rubber USB cover on a hard surface with the intent of removing any particles that may be jamming the lens.

The release button on top of the camera will not operate ¶ 

The release button is broken ¶ 

First you will need to remove the outer cover plates. Then you will need to replace the release button.

The screen is blank ¶ 

The camera isn't turned on ¶ 

Hold down the power button to turn the camera on.

The screen went to sleep ¶ 

Change the camera orientation or press any button other than the power button to turn the camera back on.

The LCD is malfunctioning ¶ 

The LCD screen may be malfunctioning, and will need to be replaced. Just follow our LCD Replacement Guide.

The camera is not recognized by the computer ¶ 

The camera isn't connected ¶ 

Check the connections at both the camera and the computer.

The software may be experiencing a bug ¶ 

Restart the camera software on the computer.

The the camera firmware, device drivers, and/or camera software may be out of date ¶ 

Go to Canon's website and locate the latest firmware updates for the camera and device drivers and camera software updates for the computer.

The software installation may have a bug ¶ 

Uninstall and reinstall the software. If possible, find the latest version of the software on Canon's website.

If this does not work, you could try installing the software in safe mode. Restart your computer in safe mode. Uninstall then reinstall the camera software.

The USB port (mini-B jack) is broken ¶ 

You will need to replace the USB port.

First start by removing the outer cover plates, then follow our USB 2.0 Hi-Speed (mini-B jack) repair guide.

The upper right slider button on top of camera will not slide ¶ 

Repair the Slider Button ¶ 

Don't worry this is a pretty simple fix. Just follow our upper right slider button repair guide.

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