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The computer will not load advanced options during startup
By holding down one of the following keys during startup, your computer
will load advanced options as shown below.
Key Advanced option
F2 BIOS utility
F12 Boot menu
0 (zero) Recovery options
If your computer starts to load the Operating System instead of desired
advanced options, follow the steps below:
1. In the Settings
charm, click Power and then select Restart.
2. Hold down the corresponding key and then release this key one
second after the computer is power on.
3. Follow the on-screen instructions to proceed.
Hardware and system checklist
This section discusses problems caused by your computer’s hardware or
attached peripherals. Basic problems may occur in the following areas:
Power
Keyboard
Internal display panel
Hard Disk Drive
Memory Media Card
Pointing device
USB device
Sound system
External monitor
LAN
Wireless LAN
Bluetooth
Power
When the computer is not plugged into an AC power outlet, the battery
pack is the primary power source. However, your computer also has a
number of other power resources, including an intelligent power supply and
a Real Time Clock (RTC) battery, all of which are interrelated with any one
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 will automatically shuts down to prevent any
damage - in this instance all unsaved data in memory will be lost.
Satellite U840W series
User's Manual 6-4