Canon EOS 250D Advanced User's Manual page 183

When flash is used, there will be two shutter sounds, but only one shot will
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be taken. Also, the time it takes to take the picture after you press the shutter
button completely will be longer than with viewfinder shooting.
If the camera is not operated for a prolonged period, the power will turn off
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automatically after the time set in [5: Auto power off] (= 261). If [5: Auto
power off] is set to [Disable], Live View shooting will end automatically after
30 min. (Camera power remains on.)
With the HDMI cable, you can display the Live View image on a TV set
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(= 305). Note that no sound will be output. If the picture does not appear on
the TV screen, check if the [5: Video system] is correctly set to [For NTSC]
or [For PAL] (depending on the video system of your TV set).
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