How do i reset the lamp time/hours on a Runco VX33i Projector ?

SOURCE: RESET LAMP HOURS

Hi Greg147

The resetting is not done in the menu.

Plug in your power cable - Machine is now in standby mode.

Then Hold down the left and right arrow keys on the Projector and press the power button. You'll see a indicator light on top of the Projector flashing twice - Lamp hours is now reset.

Hope this is of help.

SOURCE: Lamp hour reset

I don't thing that because you were not reset the time lamp used now your LCD projector stop function
What was exact the unit did? no power at all or some LED light up or flashing. In any case to reset the lamp time use you must enter when unit is on
As you mentioned you did replaced the new lamp, You should check again if you reinstalled properly the lamp and lamp cover because under the lamp cover it had a safety switch if this SW not active then the unit will be in protection mode
I sugges you to remove again the lamp and reinsert properly and secure the lamp cover and try it again and if it still is not go then let me know what are the status of the 2 LED
Cheers

SOURCE: Lamp time resetting

HI
Not sure if its in the handbook but you can download a copy from here

http://safemanuals.com/user-guide-instructions-owner-manual/SONY/VPL-CS5-_E

SOURCE: Panasonic projector PT-L78 lamp reset

Press the MENU button. Use the < > arrows to get to the OPTION menu. Press the ENTER button. Select LAMP RUN TIME. Press and hold the ENTER button for about 3 seconds. The 'lamp time reset' will display. Press OK and press the ENTER button. This will reset the lamp hours as well as turn off the projector.

SOURCE: Hello Wardens wife

What you want to do is go to the advanced menu, find the filter time and using the remote hold down reset button for 3 seconds or so while the filter time is selected. This will bring up a reset menu and reset the timer.