Pioneer AVIC-S1 - Manual (Page 25)

4. Your device turns on.
3.2 Troubleshooting
Power Problems
Power does not turn on when using battery power
z
The remaining battery power may be too low to run your device. Connect
the AC adapter to your device and then to AC power. Then, turn on your
device.
Screen Problems
Screen is off
If the screen does not respond even after you press the power button, try the
following in order until the problem is solved:
z
Connect the AC adapter to your device and to external AC power.
z
Reset your system.
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