Canon EOS 4000D Instruction Manual page 285

Horizontal stripes appear, or the exposure
or color tone look strange.
Horizontal stripes (noise) or irregular exposures can be caused by

fluorescent lighting, LED lighting, or other light sources during
viewfinder or Live View shooting. Also, the exposure or color tone may
not come out right. A slow shutter speed may solve the problem.
The standard exposure cannot be obtained or the
exposure is irregular.
If you use a TS-E lens and shift or tilt the lens or use an Extension

Tube, the standard exposure may not be obtained or the exposure
may be irregular.
The continuous shooting speed is slow.
Depending on the lens type, shutter speed, aperture, subject

conditions, brightness, etc., the continuous shooting speed may
become slower.
The maximum burst during continuous shooting is lower.
Under [53: Custom Functions (C.Fn)], set [5: High ISO speed

noise reduct'n] to [0: Standard], [1: Low], or [3: Disable]. If it is set to
[2: Strong], the maximum burst during continuous shooting will greatly
decrease (p.261).
During white balance bracketing, the maximum burst for continuous

shooting will decrease (p.134).
If you shoot something that has fine detail such as a field of grass, the

file size will be larger, and the actual maximum burst may be lower
than the number mentioned on page 87.
Troubleshooting Guide
285