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General/Hardware
General/Hardware
Question: The Forum 523/524 is not functioning.
Make sure the mains plug is properly connected.
Plug another device into the mains socket to check whether there
is any voltage.
Question: The mains plug is connected, the mains socket is
supplying output, but the Forum 523/524 still does not function.
DANGER! This device contains hazardous voltages. To
make the system dead, remove the power plug from the
socket.
Open the housing (see Opening and Closing Forum 523/524 start-
ing on page 36). Is the power LED illuminated?
If not, contact your service centre or an authorised dealer. The AC
adapter plug of the Forum 523/524 may be defective.
Question: After restarting the Forum 523/524, nothing is indi-
cated on the displays of any connected terminals.
It takes a short while for the Forum 523/524 to start up.
After the restart, check whether the activity LED blinks at a rate of
10s / 1s. This indicates that the Forum 523/524 has started up
correctly and is ready for operation. If the activity LED is not illu-
minated or the LED is dark after a short period of rhythmical
blinking or the LED blinks 3 times fast in the meantime, the
restart was not successful.
If the Forum 523/524 has not restarted properly, reset the
Forum 523/524 to its original factory setting (refer to the chapter
entitled Resetting the System Data starting on page 83).
Frequently Asked Questions
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