Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 373

If the product performs unwanted operations in response to the TV remote control when the product is connected to
another manufacturer's TV using an HDMI connection, select MENU →
FOR HDMI] → [Off].
Hint
This product is compatible with the PhotoTV HD standard. If you connect Sony PhotoTV HD-compatible devices using an HDMI
cable (sold separately), the TV is set to the image quality suitable for viewing still images, and a whole new world of photos can
be enjoyed in breathtaking high quality.
You can connect this product to Sony PhotoTV HD-compatible devices with a USB terminal using the USB cable.
The PhotoTV HD allows for a highly-detailed, photo-like expression of subtle textures and colors.
For details, refer to the operating instructions supplied with the compatible TV.
Note
Do not connect this product and another device using the output terminals of both. Doing so may cause a malfunction.
Some devices may not work properly when connected to this product. For example, they may not output video or audio.
Use an HDMI cable with the HDMI logo or a genuine Sony cable.
Use an HDMI cable that is compatible with the HDMI micro terminal of the product and the HDMI jack of the TV.
When [ TC Output] is set to [On], the image may not be output properly to the TV or recording device. In such cases, set [
TC Output] to [Off].
If images do not appear on the TV screen properly, select MENU →
[2160p/1080p], [1080p] or [1080i] according to the TV to be connected.
During HDMI output, when you switch the movie from 4K to HD image quality or vice-versa, or change the movie to a different
frame rate or different color mode, the screen may become dark. This is not a malfunction.
If you set [ File Format] to [XAVC S 4K] and shoot movies while the camera is connected to an HDMI device, images will not
be displayed on the monitor.
When [NTSC/PAL Selector] is set to PAL, the screen may black out for an instant in the following situations. This is not a
malfunction.
When you start or stop recording movies while the shooting mode is set to a mode other than
When you change the shooting mode from
When you play back a movie for the first time after switching to the playback mode.
(Movie) or to another mode.
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(Setup) → [HDMI Settings] → [CTRL
(Setup) → [HDMI Settings] → [HDMI Resolution] →
(Movie) or .