Dell S520 Projector - Manual (Page 115)

Troubleshooting Your Projector 115
9 Reset the lamp usage time by selecting "Yes" for Lamp Reset in the OSD
Power Settings of the Advanced Settings menu (see Power Settings of
the Advanced Setting menu on page 50). When a new lamp module has
been changed, the projector will automatically detect and reset the lamp
hours.
CAUTION: Lamp Disposal (for the US only)
LAMP(S) INSIDE THIS PRODUCT CONTAIN MERCURY AND MUST
BE RECYCLED OR DISPOSED OF ACCORDING TO LOCAL, STATE,
OR FEDERAL LAWS. FOR MORE INFORMATION, GO TO
WWW.DELL.COM/HG OR CONTACT THE ELECTRONIC INDUSTRIES
ALLIANCE AT WWW.EIAE.ORG. FOR LAMP-SPECIFIC DISPOSAL
INFORMATION, CHECK WWW.LAMPRECYCLE.ORG.