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Switch off the PC and check all cable connections.
Do not swap cables for various devices at random, even if they appear exactly
the same. The pole assignment of the cables may differ.
Once you have ensured that there is an adequate power supply to all devices
and that all connections are intact, switch on the PC again.
15.3. Faults and possible causes
The screen is black.
Ensure that the PC is not in sleep mode.
Time and date display is incorrect.
Click on the time display in the task bar. Select
Adjust date/time...
and then set
the correct value.
The cards in the card drive are assigned a different drive letter after a reboot.
This can happen when the card reader updates its slot during system start-
up. New IDs may then be assigned which can result in different drive letters for
some cards.
No data can be read by the optical drive.
Check whether the disc has been inserted correctly.
The mouse or keyboard does not work.
Check the cable connection.
If you have a wireless mouse or wireless keyboard, check the batteries and the
receiver.
Insufficient hard disk space.
Back up any non-necessary files on CD-Rs, DVDs or other external media.
The PC does not start.
If the cable connections are correct, try resetting the PC mains adapter. Discon-
nect the PC from the power supply. Then press and hold the main switch on the
front for 10 seconds. Wait another 5 seconds and restart the PC.
Apps (e.g. the weather app) cannot be displayed as live tiles.
Check the date, time zone and time.
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