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Watch each screen as the computer starts, if you do not see the VGA bios startup
message on each screen in turn, then try your video cards in different slots. Not all
slots on all motherboards support video. See the motherboard manual for more
information.
Try exchanging each part with a known good unit. Once the faulty part is found,
check its configuration, dip switches etc.
6.4
TESTING WAIT…. Fails
When the ALS first starts, it performs a self test. The message
Testing Wait…
will
appear on both overhead monitors. If this self test fails for any reason, you will see
the message
FAILED AT ?
.
To find out more information on this failure, close switch 8 on dips switch S1 on
the ALS board and restart the computer. The ALS will bypass the power up test,
and go directly to the self testing screen. Here it will perform a number of self
tests. See the previous section on
ALS Diagnostics
.
6.5
Computer Locks Up
If the computer randomly stops running during operation, then you have a faulty
piece of hardware. The only reliable way to pinpoint the problem is to replace each
component in turn with a known good component until the problem is eliminated.
6.6
Overhead is blank
There can be several reasons for the overhead monitors being blank.
They may have been turned off by the
Lane Control System
. Even if the power is
turned off then on again, the monitors will still go off. Use
the Lane Control
System
to turn them on again. If a
Lane Control System
is not connected, enter a
name for that lane. The monitors should come on.
The colours may have been set to all black, or the monitors may have been set to
TV. Check all these possibilities at the
Lane Control System
.
Try disconnecting the front desk communications, and closing switch 6 on dip
switch S1 on the ALS board. This will reset the battery backed ram to default. The
screens should n ow come on with default colours and settings.
