How to replace the BenQ MP720+ projector lamp

Written by
  • Shelagh M.
  • 9 years ago

BenQ_MP720PLUS_projector_CS.5JJ1K.001_projector_lampFollow this guide to replace the BenQ MP720+ projector lamp.

Invest in authentic

Save yourself unnecessary headaches — buy an authentic BenQ MP720+ projector lamp from a recognized dealer. There are hundreds of choices out there and it can be confusing finding the correct projector lamp. Price is the biggest give away. If you are buying a lamp with a price that is too good to be true, chances are it’s a counterfeit. You’re buying a whole lot of problems:

Find this lamp on Amazon from these authorized dealers:

BenQ_MP720P_projector_CS.5JJ1K.001_projector_lamp_Warning_First Replacement warning signs

When it’s time to replace the BenQ MP720+ projector lamp you’ll see a series warnings appear on screen. First message: Total (equivalent) lamp hour has reached 3000 hours. Install a new lamp for optimal performance.
BenQ_MP720P_projector_CS.5JJ1K.001_projector_lamp_Warning_Second Second message: Total (equivalent) lamp hour has reached 3950 hour. A new lamp should be fitted to avoid the inconvenience when the projector runs out of lamp time.
Third message: Total (equivalent) lamp hour has reached 4000 hours. This message will flash in the center of the screen for about 30 seconds together with the Lamp indicator lighting up red for 40 seconds
BenQ_MP720P_projector_CS.5JJ1K.001_projector_lamp_Warning_Final Final message: If this warning message displays, the projector will shut down in 40 seconds. The lamp MUST be replaced before the projector will operate normally.

Replacing projector lamp

Your BenQ MP720P projector uses the BenQ CS.5JJ1K.001 projector lamp. Before installation follow these important safety instructions:

  • Reduce the risk of electrical shock by disconnecting the power cord on the BenQ MP720+ projector.
  • Reduce the risk of severe burns by allowing the projector to cool for at least 45 minutes. The projector should be cool to the touch.


  • The projector lamp cover is found on the bottom side of the BenQ MP720+ projector. Place in on something soft to avoid scratching the projector before turning it over. Lift the projector up slightly to access the screw to the projector lamp cover.
  • Loosen the screw holding the lamp cover in place.

Step A:BenQ_MP720P_projector_CS.5JJ1K_replacement_projector_lamp

  • Lift up the projector lamp cover.
  • Remove the lamp cords from the slots. Don’t lose the screw!
  • Disconnect the lamp connector by pushing it against the projector while pulling it up.

Step B:

  • Loosen the screw that secures the lamp.

BenQ_MP720P_projector_install_CS.5JJ1K-replacement-projector-lampNOTE: The BenQ CS.5JJ1K.001 projector lamp contains mercury and should not be thrown into regular garbage. Recycle your used lamps!

Insert the new BenQ CS.5JJ1K.001 projector lamp. Align the two holes on the lamp with the locators on the projector.
Step C:

  • BenQ_MP720P_projector_CS.5JJ1K_replacement_projector_lamp
  • Tighten the screw that secures the lamp. Loose screw may cause a bad connection,
    which could result in malfunction. Do not over tighten the screw.
  • Connect the lamp connector to the projector.BenQ_MP720P_projector_CS.5JJ1K_replace_projector_lamp_cover
  • Place the lamp cords back to the slots.
  • Replace the lamp cover on the BenQ MP720+ projector.
  • Reset the lamp timer. (See below for instructions.)

Resetting the lamp timer

Do not reset the BenQ MP720+ projector lamp timer if the lamp has not been replaced as this could cause damage. Don’t start the if the lamp cover has not been replaced.


  • Press and hold the Exit 5 button on the projector for 5 seconds to display the total used lamp time.
  • Press Auto on the projector or on the remote control to reset the lamp hour to “0”.
  • Wait about 5 seconds to let the OSD disappear.

Extend the projector lamp life:

  • Keep your air filters clean to avoid overheating the projector.
  • Setting Lamp Power to Whisper mode. Using Whisper mode reduces system noise and power consumption. It also extends the projector lamp life. To set Whisper mode, go into the Advanced Setup > Lamp > Lamp Power menu.
  • Learn more with Top tips for extending DLP projector lamp life.

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.