Toshiba Tecra R850 - Manual (Page 163)

AC power
If you have trouble turning on the computer with the AC adaptor connected
you should check the status of the DC IN indicator.
Please refer to Chapter 5,
Power and Power-Up Modes for further
information.
Problem Procedure
AC adaptor doesn’t
power the computer
(DC IN indicator
does not glow green) Check the connections to make sure that the
power cord/adaptor is firmly connected to the
computer and a working power outlet.
Check the condition of the cord and terminals. If
the cord is frayed or damaged it should be
replaced, while if the terminals are soiled, they
should be cleaned with a clean cotton cloth.
If the AC adaptor still does not power the
computer, you should contact TOSHIBA Support.
Battery
If you suspect a problem with the battery, you should check the status of
the DC IN indicator as well as the Battery indicator.
Problem Procedure
Battery doesn’t
power the computer The battery may be discharged - connect the AC
adaptor to recharge the battery.
R850/R840/R830
User's Manual 6-5