Canon MARK IV User Manual (en)

Handling Precautions
LCD Panel and LCD Monitor
Although the LCD monitor is manufactured with very high precision 
technology with over 99.99% effective pixels, there might be a few dead 
pixels among the remaining 0.01% or less pixels. Dead pixels displaying 
only black or red, etc., are not a malfunction. They do not affect the images 
If the LCD monitor 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.
In low or high temperatures, the LCD monitor display may seem slow or it 
might look black. It will return to normal at room temperature.
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 store or use the card near anything having a strong magnetic field 
such as a TV set, speakers, or magnet. 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.
After detaching the lens from the camera, attach the 
lens caps or put down the lens with the rear end up to 
avoid scratching the lens surface and electrical 
Cautions During Prolonged Use
If you use continuous shooting, Live View shooting, or movie shooting for a 
prolonged period, the camera may become hot. Although this is not a 
malfunction, holding the hot camera for a long period can cause slight skin