I CANNOT SWITCH OFF THE EQUIPMENT ,AS SOON AS I GET TO SWITCH OFF THE HI FI IN A FEW SECONDS THE EQUIPMENT SWITCH ON AGAIN AND I CAN SEE THE WORD DEMO ON THE SCREEN

RTFM: Page 13:

"A demonstration of the display is shown if you have not set the
clock. You can reduce the power consumed in standby mode by turning the demonstration off.
While the unit is on:
Press and hold [–DEMO] until “NO DEMO” is
displayed.
Each time you press and hold the button:
NO DEMO (off) DEMO (on)

This is a 24-hour clock.
The example shows how to set the clock for 16:25 (4:25 p.m.).
1 Press [0/I] to turn the unit on.
2 Press [CLOCK/TIMER] to display “CLOCK”.
Each time you press the button:
CLOCK>>PLAY>>REC>>Original display
Within 5 seconds
Press [SET].
3 Press [TUNING (Up or Down)] to set the time.
The time display can be changed in one minute units by tapping
the buttons, and quickly by holding down the buttons.
Press [SET].
The time is set and the original display is restored."


Or under Troubleshooting Page 38:

"The display starts up even after the unit is turned off.

The demonstration feature (–DEMO) is on. Turn it off if it is not required."

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