Lenovo 90Q8, User Manual

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• Storage or transportation:
– For common desktop computers: From -40°C (-40°F) to 55°C (131°F)
– For all-in-one desktop computers: From -20°C (-4°F) to 55°C (131°F)
Note: If your computer is stored or transported in temperatures less than 10°C (50°F), allow the computer to
rise slowly to an optimal operating temperature before use. This process might take up to two hours. Using
the computer in a lower operating temperature might result in irreparable damage to your computer.
Relative humidity
• Operating: 35%-80% (non-condensing)
• Storage: 20%–93% (non-condensing)
Atmospheric pressure
86 kPa to 106 kPa
Cleaning and maintenance
With appropriate care and maintenance, your computer will serve you reliably. The following topics offer
information to help you keep your computer working with best performance.
Basic maintenance tips
Here are some basic points about keeping your computer functioning properly:
• Keep the computer in a clean, dry environment. Ensure that the computer rests on a flat, steady surface.
• Do not cover any of air vents. These air vents provide airflow to keep the computer from overheating.
• Keep electrical appliances such as an electric fan, radio, high-powered speakers, air conditioner, and
microwave oven away from your computer because the strong magnetic fields generated by these
appliances can damage the monitor and data on the storage drive.
• Keep food and drinks away from all parts of the computer. Food particles and spills might make the
keyboard and mouse stick and unusable.
• Do not get the power switches or other controls wet. Moisture can damage these parts and cause an
electrical hazard.
• Always disconnect a power cord by grasping the plug instead of the cord.
• Keep the computer software, device drivers, and operating system up-to-date.
• Empty your recycle bin on a regular basis.
• Clean out your Inbox, Sent Items, and Deleted Items folders in your e-mail application on a regular basis.
• Clean up files and free up storage drive space and memory space occasionally to prevent performance
problems.
• Keep a log book. Entries might include major software or hardware changes, device-driver updates,
intermittent problems and what you did to resolve them, and other issues you might have experienced.
The cause of a problem might be change in hardware, change in software, or any other actions that might
have taken place. A log book can help you or a Lenovo technician determine the cause of a problem.
• Back up your data on the storage drive regularly. You can restore the storage drive from a backup.
• Create a recovery medium as early as possible. You can use the recovery medium to recover your
operating system even if Windows fails to start up.
• Get the most up-to-date operating system update patches, software programs, and device drivers.
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User Guide