Philips HTL4111B/12 Service Manual page 22

No audio output
No audio output
Make sure
choose the right channel
Check the signal input is
good
Check the +18V on main
board whether normal or
not
Check +5V +3.3V +1.25V
on main board whether
normal or not
Change the Amplifier
5-4
yes
you have
yes
yes
yes
yes
no
Choose the right channel
no
Change the signal source
no
Change the signal source
no
Change the main board
Trouble shooting Chart