HP Compaq Presario,Presario V4000 Maintenance And Service Manual page 246

Display Component Recycling
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WARNING: The backlight contains mercury. Caution should be
exercised when removing and handling the backlight to avoid
damaging this component and causing exposure to the mercury.
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CAUTION: The procedures in this appendix can result in damage to
display components. The only components intended for recycling
purposes are the liquid crystal display (LCD) panel and the backlight.
Careful handling should be exercised when removing these
components.
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Materials Disposal
This HP product contains mercury in the backlight in the display
assembly and may require special handling at end-of-life.
Disposal of mercury may be regulated because of environmental
considerations. For disposal or recycling information, contact
your local authorities or visit the Electronic Industries Alliance
(EIA) at
Maintenance and Service Guide
http://www.eiae.org
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