AP20 Installation and Operating Guide Page 113
AP20 Installation & Operating Guide Document # 9301H39200 Ver. 1.25
5.3.2 Error Booting the AP20
If, during boot up, an object (such as your finger) is in contact with the touch screen, the
software will fail to load. The message below will appear, and continues to scroll past until
power is recycled at the power entry module (hard boot).
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mount: mounting /dev/sda1 on /tmp/usb failed: No such device or address
mount: mounting /dev/sda on /tmp/usb failed: No such device or address
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insert USB memory stick with ap20 image
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To solve this problem, reboot the AP20, making sure nothing is in contact with the touch screen during
the boot-up process.