Posiflex HT-4712 - Manual (Page 7)

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If the system hangs due to a reason, such as software resource
conflict, please press and hold the power button for 10 seconds
around to forcedly shut down the system.
Status LED Indicator
After powering ON the HT/PB-4700 and connecting to the LAN
port, you can read the system operation status from the power and
LAN LED indicators. The LED status is described below.
LED Status Description
Solid blue System power ON
POWER
Solid orange System standby
Solid green LAN link
LAN
Flickering green & yellow Data transmission
Installing an Operating System
This product is highly professional equipment. Therefore, we do
NOT encourage you to install any operating system into this
machine without professional assistance. Posiflex Technology,
Inc. shall not be responsible for any technical support to
questions on this aspect. We suggest that you contact your dealer
for OS installation.
Operating System Recovery
For the HT/PB-4700 main system preloaded with an operating
system on HDD, Posiflex provides a recovery CD shipped with
the main system for the preloaded operating system. The system
integrator shall take care of software restoration after the OS is
recovered.
If you plan to recover your operating system, we do NOT
encourage you to recover any operating system. Please contact
your service center for operating system recovery.