Philips HTL4111B/12 Service Manual page 26

USB does not work
USB does not work
Check the USB voltage
4.75~5.25?
Check XP4 P2&P3 have
signal input?
Change the 8301
5-8
yes
yes
yes
no
Check +5V on Main PCB
no
Check the connector from IN PCB
to Main PCB
Change the USB flash disk
Trouble shooting Chart
yes