NEC VT570 User Manual page 62

6. Maintenance
6. Finally, select the menu [Default] [Clear Lamp Hour Meter] to reset the lamp usage hours.
NOTE: When the lamp exceeds 2100 hours (up to 3100 hours in Eco mode) of service, the projector cannot turn on and the menu
is not displayed. If this happens, do the following while in standby condition to clear values for the Remaining Lamp Time and the
Lamp Hour Meter:
For VT670/VT470 press the HELP button on the remote control for a minimum of 10 seconds.
For VT570/VT47 press and hold the POWER and the EXIT buttons on the remote control simultaneously for a minimum of 10
seconds.
When the lamp time clock is reset to zero, the LAMP indicator goes out.
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