Sony NPA-MQZ1K Multi Battery Adapter Kit - Manual (Page 139)

Count how many times it flashes (interval time is three seconds).
Reboot the TV by disconnecting the AC power cord from the TV for two minutes, then turn
on the TV.
If the problem persists, disconnect the AC power cord, and contact Sony Customer
Support with the number of times the Operational response LED flashes.
[147]
Index/Other
Index
About the Help Guide
Help Guide structure
Specifications
Support Site
Keeping the TV updated
Trademark information
[148] Index/Other
Index
TV programs
GUIDE/ (Guide) Channels
Parental lock
Picture/display
4K pictures
HOME menu
Picture
Date & Time
Two-screen
Language
Expert panel settings
Pixel shift
Panel refresh