Very good advice on the spot. I took the projector down and opened it up to find that a black beetle had gotten into the light engine area. Took care of removing the bug parts out with soft air pressure . Everything else was very clean but used a camera lens brush to finish up. Put the unit back together very carefully and everything lit up as it should without the spot! Thanks for sharing your knowledge.

This is great! So many repairers just say "it's not worth fixing" and it seems such a waste to throw out electronics. I got a free 3LCD Epson that has an all-yellow picture. I took it apart and found the blue mirror has come loose. I was going to chuck it out but thanks to this vid I think it will be a fairly easy fix.

Absolutely brilliantly explained Max, you're a legend! 👍👍

Fantastic thorough explanation. I just cleaned all the optics on my Panasonic PT-AX200U and I went a bit far lol. I removed the panels and had to realign each piece of glass with the alignment screws to get a good result. Each time I did an adjustment I had to remove the motherboard so not easy! There is a slight green color on the right edge of screen but hardly noticeable so I’m happy with it. New lamp replacement was needed after 2010 hrs, the bulb lasted me 14yrs which is amazing. Hopefully I didn’t go too far the picture looks like new. I did find what looked like a black smear on one of the glass panels so I cleaned it with a q-tip dipped in isopropyl alcohol. Thanks for this tutorial 👍

Amazing!! Such a great, thorough and clear explanation! Thank you so much!

Really thank you, I love projectors and I learn so much with your videos. So great 👌🙂

Great video! Exactly what I was looking for, since my old EMP-TW700 projector started yesterday to show greenish contours around words and objects. According to what you've incredebly well explained, seems that the output green polarizer is burned. I'll buy a new one and try to replace it! Many many thanks!

Thank you bro it was an important & very useful video... Good job..

Thanks, Max for your detailed explanation in this KZfaq video. However, I would like to know what you think about the full purplish imaging projected from my 6 years ago Sony VPL-HW40ES projector. Please provide me with your opinion for this case. Thanks.

Hi Max, thank you so much for this. This helped me understand the individual pieces. I have a question. I touched the LCD with my finger. Is there a way to remove my finger print?

Hey Max thanks for the great video it is very insightful. Im about to attempt to fix my projector if possible. It's a Sony VPL HW10. Currently I'm getting poor blacks and dark scenes have bad contrast. Also I have noticed that there light bleeding from the border of the image all around. Which part do you think could potentially be causing this issue?

Hi Max, brilliant video, very detailed. I have a ceiling mounted epson tw7300 projector that shows a vertical blue one third left of the screen. This line appears after a few minutes of use and generally on bright mode. It clears off while using digital cinema setting. Line appears quite late when room is cold. When I play a video of full blue screen, there is no line but is immediately visible when blue screen clears off. Line shows up as blue on black screen and shows us as pink on red screen. Any thoughts which part could be faulty? Thanks in advance

Max, thanks very much! your explaination help me to repair my projector working well. One question, why my projector input polariser only the green one? the red and blue no input polariser on the cover. many thanks!

Thank you very much for sharing max

Awesome video, great explanation. With your video I was able to diagnose my epson 4010 cinema projector. My green input polarizer is completely burned thru. Is it possible to just buy the input green polarizer?

Wow! Just Wow! This is the best explanation of how 3lcd projection works because it teaches you how things work! I came here to trouble shoot my projector and learned so much. From the video I suspect that my green tint is because of the alignment of the green input polariser. You mention it at some point. However it would really be strange since it is actually glued into place. Can it be the input polariser? Basically my projector replaces black with green...I can send you a picture if you want to explain it better. Hope you can give me some input because this is driving me crazy. Whites are fine...anything else is kind of washed out and blacks are green...

Hi bro thanks for your video

Thanks for this rare information. I have a Christie LHD700 3LCD projector that the different colours are quite badly aligned and the problem seems to be getting worse. White light is split to blue yellow and magenta components few pixels apart from each other. I guessing from your presentation that the LCDs are slightly loose inside. Do you think i could open the light engine up and get them aligned again?

Thank you so much, appreciate your efforts!!!!! Should give you more than "Like, Subscribe & Share"

great lesson kindly make one that uses colour wil land also power supply repair

Great comments. Thanks! I have a small faint white-green spot on the lower screen section. Polorizer??

Good day! Thank you very much for this very clearly and wonderfully presented information. I have the same projector you are showing here. I had a green output polarizer that was burned in the center (even though we only used the projector some 200 hours...ever!) I ordered a replacement polarizer from ebay and just replaced it, following a very helpful avsforum post with photos. I am certain I put the new polarizer in the same orientation that the old one was in. However, the end result is that everything is incredibly green now. As though there is no polarizer. Does this mean that I installed the polarizer backwards in some way? Again, I'm certain I placed it the same way that I the old one was positioned. Or does it mean I was given the wrong part altogether? Either way, I think I'm in trouble, because the JB Weld that I used to glue it in is solid as a rock and I kind of over did it! I am not optimistic that I can go back in, remove it, clean the area, and re-orient it IF that's what's needed. But I'd love to know what the utterly green image usually means so that I can decide if it's worth it. THANK YOU so much. - Matt

Hello. Wow! Greate video! Can you help me? After replacing 3lcd prism block on Epson EH-tw9300. I have light red-green linear gradient on image from left to right. Right part of image looks more light. When I disconnected the LCD one by one, I got the following brightness: Red +15%, Green +40% Blue +12% in right part of image. I bought another one 3lcd block and same gradient again. Is new 3lcd bad too or how I can fix that? Thank you!

Hi Max thank you for the video’s, very helpful. I have an Epson EHTW9000W, it switches on,opens the shutter and fans start but, does not ignite the lamp. The lamp led then flashes red, The bulb has about 2000 hrs on it. I have the original lamp which still worked when I swapped it out, have put that back in and get the same result. Is it possible to piggy back with a multimeter the bulb wires (to check for power)when starting to confirm the bulb is the fault? Had some other faults like temp led flashing intermittently just before this occurred, and a green intermittent vertical line on the screen.

Dear Max, thanks very much, my Epson projector has a problem, the whole picture is a little bit green, make the picture off color, the reason is because the input polariser? the output polariser? or the green LCD itself? many thanks.

Excellent, thanks!

Hi Max I have a Epson 3020 Powerlite with 5 yellow vertical lines running near center of the screen. I pulled apart and cleaned the unit and everything looks good. Contacted Epson and they said it might be the optical engine, but would not specify which part might be bad. Any ideas on what it could be? I am familiar with Ali Express, however would not know what part to look for to solve this problem and the internet has not been very helpful as to pinpointing the problem. Any ideas would be appreciated!

Awesome… I have a problem with my projector epson 5010, exactly right half or the projection is blurry and color mixing is not good, seems like optical engine malfunction… do you know what could be the issue?

Hello I have a Epson 3020 that suffers from uneven focus in a perfect aligned environment. Forum says that is the prism not well aligned with the lens. Do u have more info? Thanks

I have a PowerLiteHome Cinema 5010 3LCD Epson that has, ONLY AT TIMES, one Yellow Vertical line on the far right and, at times if present, turns deep blue. No rhyme or reason. Sometimes, the Vertical line will also occur on the far left side. During start-up the black background and "EPSON" logo never shows this issue. The Bulb hours are now up to 3100. I was planning to purchase a replacement, since the manual states an Ave=~4000 hours. Any thoughts / flow-diagram on how to proceed would be greatly appreciated.

So I took my projector apart (turns out spiders like hanging out on the prism?) And when I lifted the prism all the out polarizer fell out and are mixed am I screwed? Is there a way to figure out where they go?

I know it's a two year old video, but when I saw this is the exact light engine that's in my 5020U be I thought I'd post my question. Last week we noticed something was wrong with the picture, and realized there was no red. I opened it and checked looked around, I couldn't find anything, like a mirror, out of place. I put back together and tested it, now there was no green. Opened it again, nothing. Put it back together and now there was green but no blue or red. Now I played with the ribbon connectors by having them plugged in only one at a time. There is no picture at all, not even the Epson logo. Any suggestions? Thanks, Mike

awesome, thanks.

I have a tri lcd СР-Х809 Hitachi, and the screen is always white with a horizontal, thick black line on the top. I opened it up, and nothing looks out of place or broken. What could be the issue?

wow great information that is so hard to find . thank you soo much ... on my epson tw700 there is also two adjustable filters right after the input polariser only on green and red .. do you have any idea what they are for ?

Are there any alternative names for the 'aligning glass', need a replacement for my projector but I am struggling to find one

Hi! What projector are you using here that allows the removal of inside and outside polarizer?

Have you done a Sony VPL HW40 with yellow screens

hi Max, do you know the angle of the polarized filter of green? I would try to replace the film on the glass as I have no spares for it (it is always on green, sometimes on blue but it is rare). It seems to me they are 90°

Hello. I cleaned the optical block of the proctor. After turning on the projector, my red channel polarizer burned out. After reading the form, I did not find a solution - instead of the old polarizer, install a polarizing film from the LCD display. I glued the film on the glass from the burnt out polarizer, having previously cleaned it. After turning on the projector, I saw that the colors returned to normal, but the film melted again. I tried again by sticking the film on the other side of the glass. But she melted again. In what there can be a problem? I will be grateful for advice.

greetings Max My Dell™ 3200MP Projector has a yellow tone to the lights when projected horizontally and vertically, and works fine when directed to project downwards. Please advise, what is the problem?

thx 🥇

Thank you very much ! What about an led projector with ips panel ? Cause the polarizer got burnt a bit ? Why do you need it there?

I'm getting a brown smudge on the left side of the screen output from my projector, is that a bad filter ?, if so what can be done?.

I want to use L3P08 L3P09 L3P010 instead of LCX111 LCX124 LCX101 LC080 in projectors is there any method or software that I can use

Could the blue light be out of alignment? My screen is yellow tint. Thanks

I tried to replace green LCD in epson 8350 after that I got double image. I try to lossen the LCD screws and align the image properly but during the LCD cable removable time it's again misaligned. please guide me how to solve this.

hi max this is paul i have optoma hd-142x modle projecter no power what type of problme is it can ane has an anwesser

I have an issue with misaligned panels. I cant align them in the settings my projector does not show that option. Anyone know how i can align the panels manually?

Where can I purchase new output polarizers?

what effect will happen if the tool at 10:53 duration is damaged

Oh my projector in Epson 5040ub

I'm stressed that my projector is damaged in the polarized part, there are two that are right on the prism and on the outside and the anti-glare is looking for a replacement that doesn't match so the blue and black colors disappear on the screen..please tell me the solution, thank you