Canon EOS 90D Advanced User's Manual page 30

Handling Precautions
Screen and LCD Panel
Although the screen is manufactured with very high precision technology
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with over 99.99% eff ective pixels, 0.01% or fewer of the pixels may be
dead, and there may also be spots of black, red, or other colors. This is
not a malfunction. They do not aff ect the images recorded.
If the screen is left on for a prolonged period, screen burn-in may occur

where you see remnants of what was displayed. However, this is only
temporary and will disappear when the camera is left unused for a few
days.
The screen display may seem slightly slow in low temperatures or

may look black in high temperatures. It will return to normal at room
temperature.
Cards
To protect the card and its recorded data, note the following:
Do not drop, bend, or wet the card. Do not subject it to excessive force,

physical shock, or vibration.
Do not touch the card's electronic contacts with your fi ngers or anything

metallic.
Do not affi x any stickers, etc. on the card.

Do not store or use the card near anything that has a strong magnetic

fi eld, such as a television, speakers, or magnets. Also avoid places prone
to having static electricity.
Do not leave the card in direct sunlight or near a heat source.

Store the card in a case.

Do not store the card in hot, dusty, or humid locations.

Lens
After detaching the lens from the camera, put down

the lens with the rear end up and attach the rear lens
cap to avoid scratching the lens surface and electrical
contacts (1).
30
(1)