Philips HTD5540/12 Service Manual page 27

NO +12V 、+5 and +34V output
NO
output
Check
voltage is OK.
Check
CE501&CE502 is OK
Check
CE511 &CE503 is between
5.5V and 6.5V.
Check D515,D516, D518 &D514
+12V and +5V
Yes
whether
AC input
Yes
whether
the voltage of
Yes
whether
the voltage of
Yes
Yes
Check U507,U508 and
U509 in the feedback
loop
5-8
No
Check whether Powerline is good
electrical contact.
No
Check
No
Check D505and D503
No
Trouble shooting chart
BD501 and F501
Replace component