battery charging error about docs HOT 3 CLOSED

Flashing Red Charging Indicator
It seems like indicator you are describing is different. Is the "charging" indicator on the side of the robot flashing red? Below is the link to a picture of the robot side panel. The charging indicator is number 6.
http://docs.fetchrobotics.com/_images/access_panel_numbered.png

Service Port
The service port is setup to respond to 10.42.42.42 or 10.42.42.100, these are network address of devices on the internal robot network. The service connects directly to a computer Ethernet port.
By default, the service port will try to get a IP address using DHCP. Since your computer is probably not running a DHCP server, the robot will not get an IP address.

HDMI
There have been issues with the HDMI port working with certain monitors if the robot does not start-up with the monitor plugged in. You might want to try power cycling the robot with the HDMI plugged in. Also, plug in a USB mouse or keyboard, at the same time. Ubuntu Linux will turn off screen output if there has been no activity for a while. Moving the mouse, or typing on a keyboard will wake up the monitor output.

from docs.

Important typo correction to one of @dbking77's notes above:

The service port is not setup to respond to 10.42.42.42 or 10.42.42.100, these are network address of devices on the internal robot network.

from docs.

This discussion has moved to the Fetch support site.

from docs.