InFocus ST-HB55A - Manual (Page 38)

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Maintenance
Regular maintenance of the monitor is recommended.
Dust the rear cover of the monitor regularly using a soft, dry cloth. Dust on the rear
cover may cause the cooling system of the monitor to fail. To remove stubborn
dust, only use a moistened (not dripping) cloth which has been dipped in a mild
detergent solution. See important notes below.
To clean the LCD surface, apply a non-abrasive camera lens cleaner to a soft, dry cloth.
Lightly wipe the cleaning cloth over the LCD surface in a circular motion. Avoid
using an excessive amount of cleaner, and do not apply the cleaner directly on
the LCD surface. Abrasive cleaners, solvent or other harsh chemicals might
scratch the LCD surface.
Image brightness may decrease after long-term use. In this case, the interior of the
monitor may need to be cleaned. Do not attempt to clean the monitor yourself.
Contact InFocus Corporation (
www.infocus.com/service ) for service assistance.
 Note:
1. Unplug the AC power cord before cleaning the monitor to avoid a shocking hazard.
2. When cleaning the monitor, avoid pressing too hard on the monitor surface. Excessive
force can cause damage to the monitor.
3. Do not use paper products or similar items to wipe the LCD screen. These materials
can easily scratch the LCD surface. Only use a soft dry cloth.
4. Keep sharp objects, such as writing utensils and screwdrivers, away from the LCD
surface to avoid screen damage.
5. Avoid cleaning monitors with solutions which contain ammonia, ethyl alcohol,
acetone, toluene, ethyl acid, or methyl chloride. These chemicals will damage your
monitor.