UP-5300 (serv.man6). Frequently asked questions (Aug 2002) - Sharp EPOS FAQ (repair manual). Page 11

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The 5700 / 5300
screen stays blank and
bleeps several times.
Set dip switch 6 on and reboot
the Pos then the machine will
Bleep 3 times. Then se
Dipswitch 6 off and reboot the
pos again.
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