How to install a new BenQ MP721 projector lamp

Written by
  • Shelagh M.
  • 12 years ago

BenQ MP721, BenQ 5J.J2C01.001Replace the BenQ 5J.J2C01.001 projector lamp in your BenQ MP721 projector is three easy steps.


Step 1: Know when to replace

You can expect up to 4,000 hours from the BenQ 5J.J2C01.001 in your BenQ MP721 before you need to replace it. When it’s time to replace the lamp you’ll notice the Lamp Indicator on the projector will start blinking and warning messages will appear on screen.

Warning messages

Follow the warning signs and be sure to install an authentic BenQ 5J.J2C01.001.
BenQ MP721 lamp warning 1, BenQ 5J.J1S01.001 lamp
First Warning: The BenQ 5J.J2C01.001 lamp has been in operation for 3000 hours. Replace the lamp soon so the BenQ MP721 projector will continue to work at optimum levels.

BenQ MP721 Warning message 2, BenQ BenQ 5J.J2C01.001 lamp
Second Warning: The BenQ 5J.J2C01.001 lamp has been in operation for 3950 hours. Replace the lamp as soon as possible to keep the BenQ MP721 projector working at optimum levels.
BenQ MP721 lamp warning 3, BenQ 5J.J2C01.001 lamp
Third warning: The BenQ 5J.J2C01.001 lamp has been in operation for 4000 hours. You’ll see this message for 30 seconds along with the LAMP indicator lighting up red for 30 seconds. Replace the lamp immediately.
BenQ MP721 lamp warning 4, BenQ BenQ 5J.J2C01.001 lamp
Final warning: You’re out of time! The BenQ 5J.J2C01.001 has reached end of life. The projector will shutdown in 30 seconds. The lamp MUST be replaced immediately before the BenQ MP721 projector will turn back on.

Step 2: Buying an authentic lamp

Be sure the purchase an authentic BenQ 5J.J2C01.001 projector lamp for your BenQ MP721 projector. Although generic lamps seem like a bargain, you avoid knock-off “compatible” lamps. You get what you pay for and in the case of generic lamps it’s usually a long list of problems:

Save yourself unnecessary headaches and buy authentic from a recognized dealer. You’ll be getting a far superior product with a replacement guarantee and tech support.

Looking for a less expensive option but more eco-friendly option? Want more information? Watch our step-by-step video on replacing only the BenQ 5J.J2C01.001 bulb instead of the entire lamp housing.


Step 3: Install the new BenQ 5J.J2C01.001 lamp

Before changing the lamp:

  • Reduce the risk of electrical shock by disconnecting the power cord on the BenQ MP721 projector.
  • Reduce the risk of severe burns by allowing the projector to cool for at least 45 minutes.

BenQ MP721 lamp cover, BenQ 5J.J2C01.001

  • The lamp cover is found on the bottom of the projector. Turn the projector over onto soft surface to protect the top of the projector. Loosen the two screws holding the BenQ MP721 lamp cover in place. (Use a magnetic screwdriver to make the whole process easier.)

BenQ MP721 lamp cover off, BenQ 5J.J2C01.001 lamp

  • Remove the lamp cover and place it to one side.

BenQ MP721 lamp connectors off, BenQ 5J.J2C01.00 lamp

BenQ MP721 lamp screw, BenQ BenQ 5J.J2C01.001 lamp

  • Loosen the screw on the BenQ 5J.J2C01.001 lamp. Be sure not to loose the screw as the projector will not turn on unless the lamp is properly secured into the projector. Using a magnetic-head screwdriver will ensure you don’t accidentally drop the screw into the projector!

BenQ MP721 lamp out, BenQ BenQ 5J.J2C01.001 lamp

BenQ MP721 lamp in, BenQ BenQ 5J.J2C01.001 lamp

BenQ MP721 lamp connectors in, BenQ BenQ 5J.J2C01.001 lamp

  • Tighten the lamp screw. Re-connect the BenQ 5J.J2C01.001 lamp connectors to the BenQ MP721 projector.

BenQ MP721 lamp cover on, BenQ BenQ 5J.J2C01.001 lamp

  • Re-install the BenQ MP721 lamp cover and tighten the screw.
  • Reset the total lamp hour timer.

NOTE: The BenQ 5J.J2C01.001 lamp contains mercury and should not be thrown into regular garbage. Recycle your used lamps! If you bought from an authentic manufacturer they will recycle the lamp for you at no extra cost (another reason to buy authentic lamps!


Resetting the Lamp Hour Timer

It’s important to only reset the lamp timer when the BenQ 5J.J1S01.001 lamp has been replaced. Resetting the lamp timer without changing the BenQ 5J.J1S01.001 lamp can cause significant harm to your BenQ MP721 projector.
BenQ MP721 lamp reset, BenQ BenQ 5J.J2C01.001

  • Press and hold the Exit 5 button on the BenQ MP721 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 on screen display (OSD) disappear.
  • Only reset the Lamp Hour when a new lamp has been installed in order that the life BenQ 5J.J1S01.001 can be properly tracked and prevent the projector shutting down unexpectedly.


Extending the life of the BenQ 5J.J2C01.001 lamp:

  • Keep your air filters clean to avoid overheating the projector.
  • Use the Lamp Power option on the BenQ MP721 projector and set to Economic Mode to reduce the amount of power used but extend lamp life.
  • Learn more with Top tips for extending DLP projector lamp life.


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