Lcd Is Dark; Insufficient Signal Strength - Sierra Wireless 4G LTE Tri-Fi Hotspot User Manual

98 Message type not compatible with the protocol state
99 Information element non-existent or not implemented
100 Conditional IE error
101 Message not compatible with the protocol state
111 Protocol error, unspecified
133 Error unknown
138 Lower layer failure
150 T3410 timeout
151 T3420 timeout
153 T3418 timeout
256 NAS EMM not registered
257 Service loss
Other value Protocol error, unspecified

LCD Is Dark

The following table describes situations that can cause the LCD to be dark (that is, not
displaying any text or icons), and recommends actions.
Device state LCD state
On Off (Advanced
settings > Device > Display >
LCD Backlight is set to "Off")
On On, but dormant (inactivity
timeout)
Off Off
If the LCD is still dark, use the micro-USB cable to connect the device to the AC charger or to a
computer.

Insufficient Signal Strength

If you have insufficient signal strength, an icon is displayed on the left side of the home page.
Insufficient signal strength, indicated by
Troubleshooting
Your action
Turn on the LCD: set LCD Backlight to
"On."
Briefly press the power button
the device.
Turn the device on:
Make sure a battery is inserted into the
device.
Press the power button
device until the device turns on.
, may occur because:
148
on
on the