Philips 7000 Series 27" 4K HDR Monitor - Manual (Page 38)

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Ans.: Uninterrupted display of still or static
images over an extended period
may cause "burn in", also known as
"after-imaging" or "ghost imaging",
on your screen. "Burn-in", "after-
imaging", or "ghost imaging" is a
well-known phenomenon in LCD
panel technology. In most cases,
the "burned in" or "after-imaging"
or "ghost imaging" will disappear
gradually over a period of time after
the power has been switched off.
Always activate a moving screen
saver program when you leave your
monitor unattended.
Always activate a periodic screen
refresh application if your LCD
monitor will display unchanging
static content.
Warning
Severe"burn-in" or "after-image" or
"ghost image" symptoms will not
disappear and cannot be repaired. The
damage mentioned above is not covered
under your warranty.
Q12: Why is my Display not showing
sharp text, and is displaying
jagged characters?
Ans.: Your LCD monitor works best
at its native resolution of
3840x2160@60Hz. For best display,
please use this resolution.
Q13: How to unlock/lock my hot key?
Ans.: Please press for 10 seconds to
unlock/lock the hot key, by doing so,
your monitor pops out “Attention”
to show the unlock/lock status as
shown below illustrators.
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  
Q14: Where can I find Important
Information manual mentioned
in EDFU?
Ans.: Important Information manual
can be download on the Philips
website support page."