Toshiba 1805 - Manual (Page 208)

208 If Something Goes Wrong
Resolving a hardware conflict
memory card installed, the error is not caused by the memory
card.
Power problems
Your computer receives its power through the AC adapter and
power cable or from the system batteries (main battery and
real-time clock (RTC) battery). Power problems are interrelated.
For example, a faulty AC adapter or power cable will neither
power the computer nor recharge the batteries.
Here are some typical problems and how to solve them:
The AC power light does not come on when you plug in the
AC adapter and power cable.
Make sure the AC adapter and power cable are firmly plugged into
both the wall outlet and the computer.
If the AC power light still does not come on, check that the wall
outlet is working properly by plugging in a lamp or other
appliance.
The AC adapter and power cable work correctly, but the
battery will not charge.
The battery doesn’t charge while the computer is consuming full
power. Try turning off the computer.
The main battery may not be inserted correctly in the computer.
Turn off the computer, remove the battery, clean the contacts with
a soft dry cloth (if necessary) and replace the battery.
The battery may be too hot or too cold to charge properly. Its
temperature needs to be in the range 50 degrees to 88 degrees
Fahrenheit (10 degrees to 30 degrees Celsius). If you think this is
the probable cause, let the battery reach room temperature and try
again.