The Computer Does Not Start; Hardware And System Checklist; Overheating Power Down - Toshiba PORTÉGÉ Z20t-B Series User Manual

The computer does not start

Make sure that you attached the AC adaptor and power cord/cable
properly.
If you are using the AC adaptor, check that the wall outlet is working by
plugging in another device, such as a lamp.
Verify that the computer is on by looking at the Power indicator.
If the indicator is glowing, the computer is on. Also, try turning the computer
off and then on.
If you are using an AC adaptor, verify that the computer is receiving power
from the external power source by looking at the Battery indicator. If the
indicator is glowing, the computer is connected to a live external power
source.

Hardware and system checklist

This section discusses problems caused by your computer's hardware or
attached peripherals. Basic problems might occur in the following areas:
Power
When the computer is not plugged into an AC power outlet, the battery
pack is the primary power source. Your computer also has Real-Time
Clock (RTC) function. All of the power resources are interrelated with
anyone having the ability to produce apparent power problems.

Overheating power down

If the processor's temperature reaches an unacceptably high level with
either setting, the computer automatically shuts down to prevent any
damage. In this instance, all unsaved data in memory is lost.
Problem
Computer shuts
down automatically.
User's Manual
Power
Keyboard
Internal display panel
Internal Storage
Memory Media Card
Pointing Device
Procedure
Leave the computer off until it reaches room
temperature. If the computer has reached room
temperature and it still does not start, or if it starts
but shuts down quickly, contact TOSHIBA Support.
USB device
Sound system
External monitor
LAN
Wireless LAN
Bluetooth
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