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dynabook PORTEGE X40-J Series User Manual

dynabook PORTEGE X40-J Series
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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 Procedure
Computer shuts
down automatically.
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 Technical Support.
AC power
If you have trouble turning on the computer with the AC adaptor connected,
check the status of the DC IN/Battery indicator. Refer to the Power
Condition Descriptions section for further information.
Problem Procedure
AC adaptor does not
power the computer
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.
When the USB Type-C™ adapter is used, remove
it and connect the AC adaptor to the computer
directly.
If the AC adaptor still does not power the
computer, you should contact Technical Support.
Battery
If you suspect a problem with the battery, check the status of the DC IN/
Battery indicator.
Problem Procedure
Battery does not
power the computer
The battery might be discharged. Connect the AC
adaptor to recharge the battery.
User's Manual 6-5

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dynabook PORTEGE X40-J Series Specifications

General IconGeneral
GraphicsIntel Iris Xe Graphics
WirelessWi-Fi 6 (802.11ax), Bluetooth 5.1
ProcessorUp to 11th Gen Intel® Core™ i7 Processors
Display14.0" FHD (1920 x 1080) Anti-glare
RAMUp to 32GB DDR4
StorageUp to 1TB PCIe SSD
Operating SystemWindows 10 Pro
WeightApprox. 1.05 kg
SecurityFingerprint Reader, TPM 2.0
Ports2 x Thunderbolt 4, 1 x USB 3.2, HDMI, microSD card slot

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