Bang & Olufsen BeoSound 5, Service Manual

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3.6 Fault flow chart
Fault symptom:
No/faulty picture on
BeoSound 5. (Stby. LED is OK)
Possible causes, defective:
DVI cable
PCB51, ML-PL
PCB01, Mainboard
PCB01, Motherboard
Power up
BeoMaster 5. Is
BeoSound 5
displaying a picture
at all ?
Replace W13, DVI
cable
OK?
Check W13, DVI
cable
OK?
Replace W13, DVI
cable
Connect an external
monitor to the DVI-I
terminal and
reboot.
Is the DVI-I output
OK?
Switch the two DVI
cables between the
two DVI outputs.
Is the display in
BeoSound 5 OK?
Replace PCB51,
ML-PL
OK?
On PCB01*,
Mainboard, confirm
that D200, D201
and D202 light red
OK?
On PCB01*,
Mainboard, confirm
that D100 light red
OK?
Replace PCB01,
Mainboard
Replace PCB01,
Motherboard
Replace PCB13,
Input
OK?
Confirm the
backlight in
BeoSound 5 is on
OK?
Confirm
+12V on PCB01,
Mainboard, P6 pin 1
+3.2V on PCB01,
Mainboard, P6 pin 5
OK?
Check W18, LCD
cable
OK?
Replace W18, LCD
cable
Replace PCB51, LCD
OK?
Replace PCB01,
Mainboard
Replace PCB61,
Backlight Inverter
OK?
Replace PCB01,
Motherboard
Replace PCB13,
Input
OK?
Replace PCB01,
Mainboard
OK?
Check W18, LCD
cable
OK?
Replace W18, LCD
cable
Replace PCB51, LCD
OK?
P6
P4
P5
P11
P2
P9
P3
P7
P8 P1
P10
D201
D202
D100
D200
*PCB01, Mainboard
D202 D201 D100 D200
No
Yes