If indoor shots are fine but outdoor shots are black, the camera likely isn’t handling exposure correctly in bright light. On instant cameras, common causes are:

• the brightness/exposure selector is set incorrectly
• the lens or light sensor is blocked
• the shutter or aperture isn’t opening properly
• weak batteries causing exposure problems
• film issues or expired/improperly stored film

For outdoor shots, make sure the camera is actually set to the brighter outdoor/sunny mode, the lens is fully extended, and nothing is covering the sensor or flash area. Try fresh batteries and a new pack of film if possible.

If every outdoor photo is still black in all conditions while indoor shots work, the camera may have a fault with its exposure system or shutter and may need service or replacement.