Replace the BenQ PB8240 projector lamp in 3 easy steps

Written by
  • Shelagh M.
  • 12 years ago

BenQ_PB8240_projector_BenQ_65.J4002.001_projector_lampFollow our guide to replace the BenQ 65.J4002.001 projector lamp in your BenQ PB8240 projector in 3 easy steps.

Step 1: Be prepared — buy an authentic projector lamp

Be ready to replace the lamp by first buying the correct BenQ 65.J4002.001 projector lamp for your BenQ PB8240 projector.
At first glance, a generic compatible projector lamp seems like an incredible bargain. But when you factor in their shorter life spans and poor illumination along with other problems, these lamps actually end up costing more in the long run. These are NOT authentic lamps and should be avoided for the following reasons:

Step 2: Know when to replace the projector lamp

You can expect up to 3000 hours with a new BenQ 65.J4002.001 projector lamp IF you buy from an authentic OEM from an authorized dealer.
Warning Messages
BenQ_PB8250_1980_hours_projector_lamp warning, BenQ 65.J4002.001
First warning: The BenQ 65.J4002.001 has been in operation for 1980 hours. If the projector is being run in Economic Mode you may continue until the second warning at 2980 hours at which time a second warning will appear.
BenQ_PB8250_2980_hours_projector_lamp warning, BenQ 65.J4002.001Second warning : The BenQ PB8240 projector power will shutdown in 20 hours time. Replace the BenQ 65.J4002.001 lamp immediately.
BenQ_PB8250_3000_hours_projector_lamp warning, BenQ 65.J4002.001Final warning: This message will flash in the screen’s center at 3000 hours and the Lamp Indicator will light up red for 40 seconds before the BenQ PB8240 projector shuts down. The projector will not turn on until the BenQ 65.J4002.001 lamp has been replaced.

Step 3: Replace the BenQ 65.J4002.001 projector lamp

Before changing the lamp:

  • Reduce the risk of electrical shock by disconnecting the power cord on the BenQ PB8240 projector.
  • Reduce the risk of severe burns by allowing the projector to cool for at least 45 minutes.


  • Turn the power off and disconnect the BenQ PB8240 projector.
  • The lamp cover is found on the bottom of the projector. Turn the projector over and loosen the two screws holding the BenQ PB8240 lamp cover in place. (Use a magnetic screwdriver to make the whole process easier.)

BenQ_PB8250 _lamp_screws_BenQ_65.J4002.001_projector_lamp

BenQ_PB8250 _projector_lamp_handle_BenQ_65.J4002.001_projector_lamp

  • Grab the wire handle on the BenQ 65.J4002.001 lamp so it lifts up. Slowly and gently pull theBenQ 59.J8101.CG1 lamp out of the projector. Pulling too quickly can cause the bulb to shatter. Learn what to do should the bulb shatter.
  • Avoid touching the optical components inside the projector as this can leave marks on the lenses causing image distortion and unwanted color changes.

BenQ_PB8250_new_projector_lamp_BenQ 59.J8101.CG1

  • Insert the new BenQ 65.J4002.001 lamp making sure the handle is fully locked. Tighten the screw. If the screw is too loose or too tight, the projector may not turn on.
  • Re-install the BenQ PB8240 lamp cover and tighten the screw.
  • Reset the total lamp operation timer.

NOTE: The BenQ 65.J4002.001 projector 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).

Reset the projector lamp counter

It’s important to only reset the lamp timer when the BenQ 65.J4002.001 projector  lamp has been replaced. Resetting the lamp timer without changing the BenQ 65.J4002.001 lamp can cause significant harm to your BenQ PB8240 projector.

  • BenQ_PB8250_ projector_lamp_timer_reset_BenQ 65.J4002.001Press and hold EXIT button on the projector for 3 seconds to display the total used lamp time.
  • Press MENU on either the projector or on the remote control. Scroll down to the LAMP HOUR TIMER. An adjustment message will appear.
  • Press MENU to reset the lamp hours.
  • Press EXIT.

Make your newly installed BenQ 65.J4002.001 projector lamp last longer with the following tips:

  • Keep your air filters clean to avoid overheating the projector.
  • Use the Lamp Power option on the BenQ PB8240 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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