Philips 32PFL9604H - Manual (Page 142)

3.7 Scenea 3/3
Limitations
When Scenea is on, the TV will automatically switch
to standby after 4 hours. The TV will show a message 1
minute before switching to Standby. The switching to
Standby prevents unnecessary energy use in case you
forget that Scenea is switched on.
If the Sleeptimer is set, the TV will also switch to standby
after the set time has elapsed.