Sony KDL-40NX725 Service Manual page 39

If the TV takes a considerable period of time to shut-off check the
following items:
● The TV should not be located too close to any heating
devices.
● The TV should have at least 4 inches of clearance around
the sides & rear, and 11 inches of clearance over the top to
ensure adequate ventilation.
● Check that all vented areas on the TV are clear of all dust
and debris.
●
If the TV shuts off immediately after Power-On, replacement
of the main board is recommended.
KDL-40NX725/46NX725
SECTION 4 - TROUBLESHOOTING
33