ojc123 Posted February 22, 2010 Share Posted February 22, 2010 School hall. Panasonic projector about 3 years old. Don't know the model. If I project a white slide then there is a pink cast starting from the bottom right and spreading over about 25% of the screen.The centre is bright and the left side of the screen is starting to develop the pink colour. I guess this is not a good thing and wondered if any one more experienced in projection could suggest what is causing this and if there are any easy ways to sort it. I ask the last bit more in hope than expectation. Thanks Link to comment Share on other sites More sharing options...
Biro Posted February 22, 2010 Share Posted February 22, 2010 Have you changed the lamp in those 3 years ? Link to comment Share on other sites More sharing options...
Peter Chivers Posted February 22, 2010 Share Posted February 22, 2010 When was the lamp changed? This sounds suspiciously like a lamp on the way out. The bad news is that if it is not the lamp it means that the LCD/whatever screen in the projector is failingNeither is cheap! (rats I must type quicker! :) ) Link to comment Share on other sites More sharing options...
ojc123 Posted February 22, 2010 Author Share Posted February 22, 2010 Lamp was changed about 6 months ago when it started to fade. I suspect the LCD/whatever screen is on the blink. Thanks for the prompt replies. Link to comment Share on other sites More sharing options...
AHYoung Posted February 22, 2010 Share Posted February 22, 2010 Lamp was changed about 6 months ago when it started to fade. I suspect the LCD/whatever screen is on the blink. Thanks for the prompt replies. go to www.projectorcentral.com and find your model, its almost certainly a lcd model rather than a dlp, if so id say the panels are starting to burn. In my experience uneven colour casts are never the lamp and its anoying the number of people suggest changing it as all you are doing is wasting a couple of hunder quid effectively buying a spare lamp for a worn out projector. We see a lot of units like this and as the optical engine is generally prohibitively expensive, sadly its destined for a skip as over time its only going to get slowly worse. At least a replacement will almost certainly have more durable inorganic panels. Older LCDs use organic panels and they have a finite lifespan, the fact that a lot of manufacturers only honour their warranty for 4000 hours use says a lot. You can avoid a lot of problems by cleaning the filters regularly as clogged filters mean more heat mean burnt panels and shorter lamplife Link to comment Share on other sites More sharing options...
Shez Posted February 22, 2010 Share Posted February 22, 2010 Try adjusting the focus to see if you can bring the pinkness in to focus. Dust on (one or more of) the LCD panels can cause that sort of symptom; you may find that you'll get large pink spots coming more in to focus as you throw the projected image out of focus. Depending on the projector, a clean of the LCDs may be economically viable. Link to comment Share on other sites More sharing options...
Johnparrack Posted February 23, 2010 Share Posted February 23, 2010 Agree with those that said its the Panel...tell tale signs of a Panel on its way out. Won't be dust, as that would be coloured spots..not a coloured cast (usually purple in whites). Link to comment Share on other sites More sharing options...
Biro Posted February 23, 2010 Share Posted February 23, 2010 its anoying the number of people suggest changing it as all you are doing is wasting a couple of hunder quid effectively buying a spare lamp for a worn out projector. Sorry!!! I would have thought that would be the first thing you check! Link to comment Share on other sites More sharing options...
AHYoung Posted February 23, 2010 Share Posted February 23, 2010 from a practical point of view as the projector is 3 years old, try and find out exactly when it was purchased as its almost certainly got a full 3year warranty and if you are lucky and bought it less than 3 years ago its a warranty repair as long as its within the warranty terms and panasonic will repair the thing free of charge... all panasonic need to see is an invoice with date and serial no. as the date of manufacture has no bearing on the warranty, its when the retailer sold it to the end user that the warranty starts. back to the focus, on most units if you zoom wide then focus to the extreme end, you focus on the dust stuck to the panel rather than the panel. on the image this generally manifests itself as soft focussed coloured {often blue} blothches. a moreeven colour cast is generally the panels burning out. you can however get strange coloured effects when using a vga cable with a bad connection in one of the rgb signals, the unit will work and be stable, the colours will justl ook a bit funny, its easy to check by switching to a comp. video input, if the cast is the same, its the panels. Link to comment Share on other sites More sharing options...
gnomatron Posted February 24, 2010 Share Posted February 24, 2010 The projector's menu is a good way of ruling out cable faults, if the menu's colour appears correctly then the problem isn't internal to the projector. Link to comment Share on other sites More sharing options...
nbarrass Posted February 24, 2010 Share Posted February 24, 2010 Just adding my vote to the LCD being at fault. I've seen several Panasonic projectors with the same issue coming up after 1-3 years use. Most were repaired under warrenty. Link to comment Share on other sites More sharing options...
ojc123 Posted February 25, 2010 Author Share Posted February 25, 2010 Thanks to all. I'll find out exactly when it was bought. Knowing my luck the warranty will have run out last week. Link to comment Share on other sites More sharing options...
MrBoomal Posted February 25, 2010 Share Posted February 25, 2010 I had a laptop where the screen turned pink. Turned out it was a damaged ribbon cable between computer and screen. Link to comment Share on other sites More sharing options...
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