Panasonic AE700e blue streaks

Discussion in 'Projectors, Screens & Video Processors' started by teabelly, Jan 7, 2012.

  1. teabelly

    teabelly
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    My ae700e has started having two horizontal blue streaks on the right hand side of the screen. It isn't always apparent but seems to appear after being on for several hours. If you pick a blank input you can see a pronounced 'ripple' as it is the same blue as the blank screen. It seems to be getting worse as I'm writing this :(

    It is really annoying as I bought a new bulb a few months ago as the current one was getting up to 1500 hours and they often pop not long after. If I'd known it would do this I wouldn't have wasted £160 on a cheap replacement bulb.

    What is likely to be the problem and are the parts cheap to replace?
     
  2. teabelly

    teabelly
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    I've just noticed there's a panasonic repair specialist just up the road from me.... fingers crossed they can do something at a reasonable price.
     
  3. paulmcp2403

    paulmcp2403
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    I have 4500 hours on my original bulb and its almost 6.5 years old :thumbsup:

    Part are expensive....so much so that it would be cheaper to buy a second hand one for spares...:thumbsup:
     
  4. paulmcp2403

    paulmcp2403
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    good stuff...let us know how you go buddy :thumbsup:
     
  5. teabelly

    teabelly
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    They said it was likely to be a filter on the blue channel which could be up to £150 to repair which is leaning into the uneconomic territory. A service/clean might help which was around £50 odd.

    Not sure whether to spend that money or just run it until both bulbs have popped or it is too blue to watch at all (could be several years!)
     
  6. True Romance

    True Romance
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    The trouble is like all things, once you know its there it will bug the hell out of you :(
     
  7. teabelly

    teabelly
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    It is only annoying after a couple of hours really. Initially the blue isn't really noticeable. Might try hoovering it out in case it is just dust making a slight over heating problem worse. They suggested a service (which is basically cleaning it out) might help.

    It just seems daft to spend money on something with stupidly expensive bulbs that don't last when you can get an ok hd led projector now for the cost of a bulb + repair....
     
  8. habakoski

    habakoski
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    Oh it's the very standard old Panasonic 700 fault: the organic panels are degrading. Been there, done that. To fix it, they would have to change the whole optical block which is really expensive. You can try to neutralize it temporarily by displaying completely white screen for good 10-15 minutes.

    Results may vary but my Panny took ~5000 hours before half of the picture was covered with strong blue haze.
     
  9. teabelly

    teabelly
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    Oooh. I'll try the white screen thing. It defaults to blue ironically with no input and you can see a 'ripple' effect when it is doing the blue haze. I'll see if I can find a white source.

    Do you happen to know exactly what fails in the optical block? I've been trying to get hold of a service manual for it as that would help show what kind of components have actually failed.
     
  10. habakoski

    habakoski
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    I'm not not sure what technically is failing organic LCD panels but Texas Instruments (DLP chip maker) has addressed this in past (see: Texas Instruments' DLP vs. LCD Evaluation )

    It's well-known among hobbyists that these projectors equipped with organic panels tend to go bad. The manufacturers don't obviously want to point this out and they have silently just moved to inorganic panels. Those sneaky bastards.

    I have another useful link for you. You can find some more advanced tips towards the end of the thread: Burn-In on an LCD projector??? (panny 700) [Text View] - AVS Forum
     
  11. teabelly

    teabelly
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    Thanks. Managed to find a service manual at least :) Other people have mentioned the polarizer going wrong.

    I'll shall change the back light colour away from blue. It's already on the higher fan setting as I thought heat might be an issue.
     
  12. doac00

    doac00
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    Mate - not sure how you are getting on with fixing this - but I have a perfect working Panasonic AE700e up for grabs since upgrading recently - I'm more than willing to let mine go for a reasonable offer as it's not doing anything. I'm still on the original bulb and have only used it on weekends since it was aqcuired. Presently live in the London region if you where interested and wanted tio see it up and running.

    It's an option ;-)
     
  13. teabelly

    teabelly
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    It is an option but I'm a tight fisted swine so I have currently opted to use the colour management to turn that shade of blue down a little which takes some of the annoyance away :)
     
  14. doac00

    doac00
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    ok buddy - sorry for delay in reply - it's still up for grabs - It is available for any reasonable offer as it ain't doing nothing.

    Chris
     

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