Follow 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:
- shorter lamp life than original lamps
- toxic materials and carcinogenic parts including Krypton-85
- prone to explosions
- incompatibility causing damage to the sensitive electronics in your projectors
- no guarantee or refunds – you’re on your own to get a refund from the company when you buy from a reseller
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.
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.
Second warning : The BenQ PB8240 projector power will shutdown in 20 hours time. Replace the BenQ 65.J4002.001 lamp immediately.
Final 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.)
- Loosen the screw on the BenQ 65.J4002.001 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.
- 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.
- Press 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