Hardwarefailure, Allleddark, Simslot – Hongdian H8922 Dual SIM Single Module User Manual
Page 137: Ethernetconnection, 1 hardware failure, 1 all led dark, 2 sim slot, 3 ethernet connection, Phenomenon, Possible reason

H8922 3G/4G Router
5 Router config
Version (2014-05-28)
5 -101
7.3 VPN
Possible problem when connecting VPN
7.4 WEB config problem
config problem
Possible WEB config problem and how to handle them
7.1 Hardware Failure
7.1.1 All LED dark
Phenomenon
Router LED all dark
Possible Reason
Power supply does not match, it should be 5-36VDC
No power supply
Solution
Make sure the power supply is 5~36VDC
Check the power adapter and cable connection
7.1.2 SIM Slot
Phenomenon
Cannot insert SIM card
Possible Reason
SIM slot damaged
SIM card wrong direction
Solution
SIM slot damaged, please contact us to repair
Check the SIM card direction, please make sure the SIM goldfinger is up
7.1.3 Ethernet Connection
Phenomenon
LAN LED dark, cannot visit router WEB GUI
Possible Reason
Ethernet cable connection problem
Ethernet cable damage