Olivetti M15 Plus - Trouble SHOOTING, CUSTOMER TEST; Troubleshooting

TROUBLE SHOOTING, CUSTOMER TEST
TROUBLESHOOTING
There are many situations in which problems may arise, for
which you can yourself pinpoint the cause, and then easily
supply the remedy.
The following list gives you guidelines for solving many of
these problems.
1. PROBLEM:
When the system is switched on (Power indicator light
ON ) nothing appears on the screen.
POSSIBLE CAUSE 1:
When working on AC supply: You have not adjusted
the contrast control correctly.
POSSIBLE SOLUTION 1:
Turn the contrast control slowly in both
directions, and find the optimum setting.
POSSIBLE CAUSE 2:
When working on batteries: The battery is
completely discharged. You may have forgotten to
switch the system off. (In this case the POWER
indicator light does not come on.)
POSSIBLE SOLUTION 2:
Change back
to AC operation.
batteries.
2. PROBLEM:
Recharge the
On battery: after switching the system on, several
lines appear on the screen, the diagnostics do not run,
the battery indicator does not light, and there is no
acoustic signal (or only one beep).
POSSIBLE CAUSE:
Batteries too discharged.
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