EVOC M50 Series, Manual, Page: 231 / 250

Appendix
M50 SERIES · 101 ·
12.2 Common Alarm Information Analysis and Solution
Alarm Information Meaning and Solution
EFI BIOS. After the product is booted,
the screen displays yellow alarm
information “Warning system time is
invalid ， please set it to right”.
Motherboard CMOS time setting
error, which needs to be corrected.
After bootup of motherboard, the screen
shows: “Reboot and Select proper Boot
device or Insert Boot Media in selected
Boot device and press a key”.
The current disk cannot be booted,
and the system HDD cable needs to be
rechecked, or use optical drive for
reinstallation of operating system.
Award BIOS motherboard. During Power
On Self Test (POST), the screen displays
error information: “Keyboard error or no
keyboard present”.
The motherboard or complete PC is
not connected to PS/2 or USB
keyboard, and keyboard needs to be
connected properly.
EFI BIOS. During motherboard Power
On Self Test (POST),
“beep-beep-beep-beep-beep” five beeps
can be heard.
The motherboard or complete PC is
not connected to PS/2 or USB
keyboard, and keyboard needs to be
connected properly.
Redundant power supply equipped with
the complete PC. After the PC is powered
on, the PC power supply gives off
piercing alarms.
The redundant power supply is not
connected to two AC plugs. The PC
should be powered off, and connect
the two AC plugs.
12.3 ESD Guideline
Definition of ESD
All the electronic modules are equipped with large-scale integrated IC or assemblies.
Due to their own design, these electronic components are extremely sensitive to
over-voltage, so they are also extremely sensitive to any ESD.
ESD-sensitive assemblies/modules are usually called ESD devices. It is also the
internationally universal abbreviation for this type of devices.