N4100+ simple diagnosis flowchart 1/3 10/23/2008
N4100+ simple diagnosis flowchart
1. Purpose: to provide end users and customers a simple and quick procedure to identify
which part failed in N4100+.
2. Procedure
2-0. Don’t insert any HDDs into the N4100+ system. Attach the power cord and then reset the
IP address and admin password to the default settings.
a) Power on the N4100+ and immediately press the Reset button for 30 seconds.
b) This resets the N4100+ to its default IP address and password settings.
Default IP: 192.168.1.100
Default admin password: admin
2-1. Insert at least one HDD into the N4100+ system, attach the power cord and connect the
LAN cable between N4100+ WAN port and a PC or NB. Don’t use a HUB.
2-2. Turn on the N4100+ system and check the front panel LED behavior. The power LED
should glow blue after power button pressed. About 50~60 seconds later, the busy LED
starts blinking orange for around 20 seconds. If the power LED glows blue but the busy
LED never blinks, the firmware may be corrupted during improper firmware upgrade
procedures. It means the motherboard doesn’t work any more and need to be repaired.
2-3. Set the IP address of a PC or NB as 192.168.1.111, and then access the login webpage.
Make sure the N4100+ and the PC or NB is directly connected through a LAN cable, not
through a HUB or a router.
2-4. Check if the Admin login webpage shows up and works fine. Then check if the system
status is normal and HDD power LED works fine. In case the results are positive, it
means the N4100 system is OK. Otherwise, the N4100+ is damaged.
2-4-1. Since press the reset button during booting process, and N4100+’s WAN IP address
will be set to 192.168.1.100 temporarily. At this time all the file services will be stopped.
When you point your browser to 192.168.1.100, you will see the following screen.
N4100+ simple diagnosis flowchart 2/3 10/23/2008
N4100+ simple diagnosis flowchart
Please select “Reset to Factory Default” option and press the apply button, the system will be
reset.
When select “Reset to Factory Default” option, the system will be reset. Below are the default
system settings:
Admin password → admin
WAN IP address → 192.168.1.100
WAN IP Gateway → 192.168.1.1
LAN Jumbo Frame Support → Off
LAN IP → 192.168.1.100
LAN Jumbo Frame Support → Off
HTTP Port → 80
HTTPS port → 443
2-5. Suppose the N4100+ is bad. If the power LED glows blue and both system and power
fans work fine after power button pressed, the motherboard needs to be checked and
repaired. Otherwise, the power supply unit has problems.
N4100+ simple diagnosis flowchart 3/3 10/23/2008
N4100+ simple diagnosis flowchart
N
4. Admin login &
RAID status OK?
1. Insert at least one
HDD, attach the
power cord and
connect LAN cable
Y
5. Power LED
glows blue, system fan works,
and power fan works?
NAS is OK
MB is bad
Y
N
Power
supply unit
is bad
N
3. Set the IP address
of PC or NB as
192.168.1.111, and
then login NAS
2. Power LED
glows blue but Busy LED
never blinks?
Firmware
corrupted
(MB is bad)
Y
0. Reset the IP Address and admin password to default setting.
a) Power on the N4100+ and immediately press the Reset button for 10
seconds.
b) This resets the N4100+ to its default IP address and password settings..
Default IP: 192.168.1.100
Default admin password: admin
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