benqprojectorrepair

UK : +44 (0)333 006 4326 | IE : +353 (1) 582 7344

BenQ Projector Knowledge Base | Wells Electronics

BenQ Projector Knowledge Base

Welcome to the Wells Electronics knowledge base for BenQ projectors. Here you will find troubleshooting guides, error code explanations, maintenance tips, and downloadable manuals to help you get the best from your projector.

Book a Free Collection

Knowledge Base

Quick, practical guides for common BenQ projector issues. Use search or category filters, or browse the featured articles.

All Lamp & Ballast BlueCore Laser LED & Smart
Showing all articles.

Lamp & Ballast

Lamp strikes, dim image, colour wheel timing, ballast faults.

BlueCore Laser

Light source errors, derating, optical engine cleanliness.

LED & Smart

Android TV crashes, HDMI handshakes, LED drivers.

Projector Starts then Shuts Down (Lamp Units)

  1. Check lamp hours; fit a known‑good lamp if near EOL.
  2. Clean filters/vents; ensure fans reach target RPM.
  3. Verify door‑switch/interlocks are engaged.
  4. Scope ballast ignition; if misfiring, service/replace.

Book a Free Collection

“Light Source Error” on BlueCore Laser

  • Restore airflow; replace slow/noisy fans.
  • Measure driver rails for ripple/regulation drift.
  • Check for optics contamination / haze.
  • Apply correct‑region firmware; re‑test.

Request Help

White Spots / Starry Image (DLP)

Progressive white dots are almost always a failing DMD chip. Cleaning won’t remove fixed dots.

  • Confirm on multiple inputs / test patterns.
  • Replace DMD; re‑paste heatsink; verify thermals.
  • Inspect optics; remove dust from the light path.

Get a DMD Quote

Colour Wheel Noise / Rainbow Artifacts

  • Listen for bearing whine/scrape; replace wheel if noisy.
  • Check Hall sensor waveform; correct timing if unstable.
  • Ensure no cable rub/debris in the wheel shroud.

Fans Spinning but Overheating / Fan Error

Likely a tach feedback or fan controller IC issue. The fans move air, but the RPM signal fails validation.

  1. Check RPM in service menu (if available).
  2. Test PWM/TACH lines; inspect controller board.
  3. Replace failed fan or controller IC; verify temps.

Android TV / App Crashes

  • Wipe app/cache data; apply latest firmware.
  • Test on clean boot; avoid power loss during updates.
  • Reset network; re‑pair remotes; test HDMI direct.

No Signal / HDMI Handshake Problems

  • Try short, high‑quality HDMI leads; bypass AVRs.
  • Disable CEC/ARC during diagnosis; reset EDID if possible.
  • Inspect HDMI socket; check ESD arrays/retimers.

Firmware Update Stuck / Failed

  • Confirm the correct region image; verify checksum.
  • Do not power‑cycle mid‑update; retry with stable power.
  • If bricked, service reflash is required.

Dusty Image / ANSI Contrast Loss

Fine dust on mirrors/prisms lowers contrast and adds a mild colour cast.

  • Non‑invasive clean of optics where possible.
  • Restore airflow and replace tired fans.
  • Re‑test uniformity after service.

Lamp Hours Won’t Reset / Still Dim

  • Use genuine lamp modules; reseat housing firmly.
  • Reset hours in the menu; check interlock switch.
  • If still dim, test ballast and colour wheel timing.

Quick Answers

My fans spin but I still get an overheating error.

Likely a fan controller IC or tach feedback issue. The fans move air but RPM isn’t validated. Controller/board service usually resolves it.

After replacing the lamp, the image is dim.

Check that the lamp is genuine and seated. Verify colour wheel timing and clean the optics/filters. Measure ballast outputs if strike takes multiple attempts.

How often should I clean filters?

Monthly in dusty spaces, quarterly otherwise. Record brightness and noise levels to catch slow fan failures early.

Manuals

Tools & References

  • Maintenance checklists (PDF)
  • Service bulletins for known faults
  • Firmware utilities (from BenQ support)

Can’t find your issue?

Describe the symptoms and we’ll triage it remotely. If needed, we’ll arrange free collection & return.

Contact a Technician
#marqueecontainer{ position: relative; width: 100%; /*marquee width */ height: 260px; /*marquee height */ background-color: #13181C; overflow: hidden; border: 0px solid #34383D; padding: 8px 17px 1px; padding-left: 4px; } /*********************************************** * Cross browser Marquee II- (c) Dynamic Drive (www.dynamicdrive.com) * Please keep this notice intact * Visit http://www.dynamicdrive.com/ for this script and 100s more. ***********************************************/ var delayb4scroll=2000 //Specify initial delay before marquee starts to scroll on page (2000=2 seconds) var marqueespeed=1 //Specify marquee scroll speed (larger is faster 1-10) var pauseit=1 //Pause marquee onMousever (0=no. 1=yes)? ////NO NEED TO EDIT BELOW THIS LINE//////////// var copyspeed=marqueespeed var pausespeed=(pauseit==0)? copyspeed: 0 var actualheight='' function scrollmarquee(){ if (parseInt(cross_marquee.style.top)>(actualheight*(-1)+8)) cross_marquee.style.top=parseInt(cross_marquee.style.top)-copyspeed+"px" else cross_marquee.style.top=parseInt(marqueeheight)+8+"px" } function initializemarquee(){ cross_marquee=document.getElementById("vmarquee") cross_marquee.style.top=0 marqueeheight=document.getElementById("marqueecontainer").offsetHeight actualheight=cross_marquee.offsetHeight if (window.opera || navigator.userAgent.indexOf("Netscape/7")!=-1){ //if Opera or Netscape 7x, add scrollbars to scroll and exit cross_marquee.style.height=marqueeheight+"px" cross_marquee.style.overflow="scroll" return } setTimeout('lefttime=setInterval("scrollmarquee()",30)', delayb4scroll) } if (window.addEventListener) window.addEventListener("load", initializemarquee, false) else if (window.attachEvent) window.attachEvent("onload", initializemarquee) else if (document.getElementById) window.onload=initializemarquee
  • Country: England
    Model: 2040 3D 3LCD Issue: Needs lamp replacement
    Date: 2021-06-29
  • Country: Scotland
    Model: GT1080 Issue: Looking to get HDMI SOCKET FIXED AS MEMBER STOOD ON CLABE AND ITS NOW LOOSE AND IS CUTTING ON AND OFF SOMETIMES SO NEED NEW HDMI SOCKET FIXED
    Date: 2021-06-27
  • Country: England
    Model: Hd33 Issue: Hi , I have a optoma hd33 , issue is its blowing the main fuse in the plug ( into the wall socket ), can only think its a power board issue ? its still a great picture but i know its ageing now , if it is the power board what would be a estimate to fix , or i just buy a another projector , i am down in london in approx 4 weeks so can maybe post down and pick up when i,m down which would be my preferred option and drive back i have the original box etc thanks howard
    Date: 2021-07-01
  • Country: Scotland
    Model: LC-XB43 Issue: Hi there
    Have an Eiki projector LC-XB43 (around 12yrs old) which fails to light the bulb despite changing to another bulb. Reading the forums makes me wonder if this is a ballast failure. Is this a device that you would consider assessing for repair?
    Alasdair Meek
    Date: 2021-07-07
  • Country: England
    Model: Halo Issue: A couple of cables got disconnected from the circuit board. No damage on the housing and the lens.
    Date: 2021-06-25
  • Country: England
    Model: W2000 Issue: Hi, I have BenQ W2000 projector which as visible dust particles in projected screen. I wish to clean it.
    Could you let me know what would be the price?
    Date: 2021-06-23
  • Country: England
    Model: SANYO multiverse projector model no. PLC-XU5 Issue: the projector lit up the needing new bulb, bought one and still doesn't work
    Date: 2021-06-22
  • Country: England
    Model: DLA-X55R Issue: Hi Folks,

    My Hone cinema projector won't power on, perhaps over heated, I'd like a quote for repair please.

    Many thanks
    Date: 2021-06-16
  • Country: Scotland
    Model: HD720X Issue: Hello, so I got this projector with an issue I think regarding the colour wheel. When I plugged it in, one of the lights on the top (don't remember which) was blinking red-- and then when I turned it on it made a rumbling, vibrating noise. It displayed image, but the noise was so violent I turned it off.

    I opened the projector in hopes of maybe clearing some dust (if it was dust in the fan causing the issue) but it seems I did something wrong in the process because now it doesn't have a light of any kind when I plug it in.
    Date: 2021-06-11
  • Country: Scotland
    Model: Ricoh 8mm projector Issue: I dont know whats wrong with it
    Date: 2021-06-30
  • Country: England
    Model: EH-TW6100W Model H502B Issue: With the original bulb in place unit will start up but then fail with red flashing lamp light after a few seconds of projecting an image other than the no source blue screen.
    With a replacement bulb inserted unit will not boot, Fan goes into overdrive and lamp never comes on
    Date: 2021-06-03
  • Country: England
    Model: PT-RZ470 Issue: Projector light (red) indicator is on and will not boot up
    Date: 2021-06-03
  • Country: England
    Model: plv z5 Issue: After between 10-60 minutes the light turns off. I can start again and the same will happen. The bulb has been replaced and it hasn't helped. Are you able to fix it please?
    Date: 2021-06-01
  • Country: England
    Model: h7550bd Issue: Hi, I am getting a fan fail error after the projector has been on for around 5 minutes. It doesn't seem that there is any excessive dust and there is only around 300 lamp hours on the projector from new.
    Date: 2021-06-05
  • Country: England
    Model: optoma hd141x full hd 3d 1080p projector Issue: I am after a proper service for the machine, suspect the bulb needs a refresh
    Date: 2021-05-28
  • Country: England
    Model: ARTLII PROJECTOR RD-630 Issue: Hey, the projector fan is broken and it will not take a charge to allow it to work off the charging cable. It is a fairly new projector and only been used a few times. Are you able to help?
    Date: 2021-05-28
  • Country: England
    Model: ARTLII PROJECTOR RD-630 Issue: Hey, the projector fan is broken and it will not take a charge to allow it to work off the charging cable. It is a fairly new projector and only been used a few times. Are you able to help?
    Date: 2021-05-28
  • Country: England
    Model: JMGO N7L Issue: Hi I have a JMGO N7L which has white spots on the projector image . Is this something that you can fix ?
    Date: 2021-05-10
  • Country: England
    Model: HD25E Issue: I need to replace the colour wheel.
    The colour wheel has already been cleaned by a professional but it still doesn’t work,
    Impossible to find the right colour wheel to replace.
    Date: 2021-05-11
  • Country: Scotland
    Model: EB U05 Issue: The projector will not power on
    Date: 2021-04-28
  • Country: England
    Model: Optoma uhd300x 4K uhd Issue: Unsure what the fault is. The lamp warning led has not lit up. The optoma logo appears & then it blacks out. The projector is in a fixed position, so hasn't been knocked or anything.
    Date: 2021-04-29
  • Country: England
    Model: VPL-CH350 Issue: Unit is failing to boot up. Remote control prompts the power light to turn from red to green, but after a few seconds it goes red again.
    Date: 2021-04-19
  • Country: England
    Model: EB-2055 Issue: Hi. I think the fan has gone in our projector. It’s has the temperature warning light flashing and is making a loud noise and the fan at the front isn’t seen spinning through the casing
    Date: 2021-04-12
  • Country: England
    Model: H375B Issue: When turning on I heard a large clicking noise and then when the projector is running there is a humming noise which I have never heard before
    Date: 2021-04-19
  • Country: Wales
    Model: Np15lp Issue: Hi i cleaned the lenses on my projector and now the colours are messed up was wondering if you could fix it plz
    Date: 2021-04-07
  • Country: England
    Model: Screenplay 5700 Issue: The [rojcetor powers up lamp fires up but looks like bits of a barcode on the screen and after a while it shuts down. Not been used for a number of years.

    Date: 2021-04-09
  • Country: Scotland
    Model: Yaber v2, dr q hi-04 Issue: 2 projectors wigh no response to power
    Date: 2021-03-29
  • Country: England
    Model: EB-485W Issue: Temp light flashing after 5-10mins
    power down and a reboot, runs again for 5-10mins
    Date: 2021-03-29
  • Country: England
    Model: PLV-Z700 Issue: Projector ceased operation. Has a new lamp. However the power connector appears to have been pushed back into the units housing. So, it won't connect with lead
    Date: 2021-03-30
  • Country: Scotland
    Model: H1P1406 Issue: The prjector has intermttanlty been showing a fan warning, and then working normally for several weeks. Today it styopped working at all.
    Date: 2021-03-25
  • Country: England
    Model: EH TW9300 Issue: My projector has lost some lumens output due to dust buildup inside. I have already changed the lamp however this made little difference. There are no obvious marks or dullness on the screen. I just need to improve the light output of the projector. If looking at the lens when on you can see the reflection of dust from the inside.
    Date: 2021-03-16
  • Country: England
    Model: w1200 Issue: RTRTRTRYR
    Date: 2021-03-24
  • Country: Scotland
    Model: W1070 Issue: The projector picture started to go green and very faint, I have replaced the lamp but still no improvement.
    Date: 2021-03-22
  • Country: Scotland
    Model: Pro 150s Issue: I could potentially drop the projector off at your premises in Glasgow. Give me a call, or a text, if that would suit you?
    Date: 2021-03-09
  • Country: England
    Model: Toumein v5 Issue: Hello,

    My toumei v5 projector is about 2-3 years old and was in really good condition (haven’t used it at all for a year). But now for some reason, the image is very blurred and I tried s lot of things (manufacture reset, power on/off, unplug/rest/restart, cleaning the lens gently, change settings, f’change focus settings etc) but nothing fixes it.

    Could you give me a approximate cost for this fix-up?
    Date: 2021-03-08
  • Country: Scotland
    Model: Epson Tw6000 Issue: Hi. Could you please give me a quote for my projector repair. Both of red light flashing. Its says internal problems. Thanks
    Date: 2021-02-24
  • Country: Scotland
    Model: Epson Tw6000 Issue: Hi. Could you please give me a quote for my projector repair. Both of red light flashing. Its says internal problems. Thanks
    Date: 2021-02-24
  • Country: England
    Model: ViewSonic PLED-W800 Issue: hi I have 1xViewSonic PLED-W800 tha needs the adapter hole fixed.

    one epson Epson EH-TW6100 - no menu showing just blu screen
    Date: 2021-02-16
  • Country: England
    Model: HC3800 HD DLP Issue: I have recently purchased this projector as second hand. I have had no problems with it so far, however I have now tried to turn it on without success. Now it will turn on for approx three seconds with the power/status LEDs as green. The projector then switches off with the power button flashing red and green, with the status button flashing red. Please can you advise if you will be able to solve this issue and kindly provide a quote.

    Thank you.
    Date: 2020-08-17
  • Country: England
    Model: w1070+ Issue: I seem to have dust spots on the back of the lense that need cleaning.
    Date: 2020-08-04


SITE TAGS
Discolouration Dull or Blotches on Projected Image Privacy Policy projector-recycling Warranty & Return Policy

LOCATIONS

SERVICE AREAS

[footerlinks]