LG BH5140S Service Manual page 31

DIGITAL DISPLAY & MEDIA TRAINING MASTER
4-3. Humming/Clicking Noise
The unit is making a humming noise or a clicking noise.
Does the noise only happen
when a disc is playing?
YES
Does the noise happen when the
BD is turned on?
4-4. Audio/Video Out of Synch
The audio and video do not match up. People look to be talking, but their voices are delayed by a few seconds.
Has the customer tried multiple
tapes and discs?
YES
How are the cables routed?
YES
Has the customer connected to
another TV?
BDs make a slight hum when playing discs. A clicking noise or a noise
NO
interfering with audio may indicate a problem. Try multiple discs.
Multiple discs with the same issue means the BD may need service or be
professionally cleaned. Check BD service for service instructions.
Check to see if a disc is inserted into the BD and eject the disc.
NO
A humming or clicking noise when the disc is not inserted may be a
cooling fan. Check OM to see if cooling fan is present. If not, unit will need
service. See BD service for service instructions.
If the issue only shows up on one disc, then the problem is with that disc.
NO
Have the customer try multiple tapes or discs. If the issue happens on
multiple discs and tapes, then ask the customer to try a lens or a head
Make sure cables are routed properly. Make sure audio and video cables
NO
are routed to the same source (if possible). Routed audio and video to
separate products can cause a bit of a delay between the devices as not
all devices will process audio and video signals at the same speed.
Ask the customer to connect the product to another TV. If the issue
NO
persists, try another set of cables. If the issue still persists, then the issue
is with the unit. The unit will need service.
Arrange service following proper procedure.
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cleaner.