TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

DIY UV Treatment for Yellowed MCU Screen

Discussion in 'Model S' started by ucmndd, Nov 24, 2019.

  1. Shateam

    Shateam Member

    Joined:
    Apr 13, 2016
    Messages:
    553
    Location:
    NJ
    Thanks for sharing @ucmndd

    Dumb question, does the MCU need to be on while applying the treatment?
     
  2. Ken7

    Ken7 Member

    Joined:
    Feb 11, 2017
    Messages:
    880
    Location:
    New York
    @ucmndd- I had mine done at a SC, but for those trying the ‘DIY method’, do you think there’s a point that’s crossed where the screen could be ‘overcooked’ if the light is allowed to shine for too long a period?
     
  3. ucmndd

    ucmndd Well-Known Member

    Joined:
    Mar 10, 2016
    Messages:
    5,380
    Location:
    California
    No, I purposely left mine off.
     
    • Informative x 2
  4. ucmndd

    ucmndd Well-Known Member

    Joined:
    Mar 10, 2016
    Messages:
    5,380
    Location:
    California
    I suppose eventually it could damage the LCD, though I have no real basis to support this theory.

    By all accounts the lamp used by the service center is a great deal more powerful than this DIY approach, so I figure they’ve decided there’s plenty of margin for error and we’re unlikely to cause problems with a hobby lamp from Amazon.
     
    • Informative x 1
  5. bnsfengineer

    bnsfengineer Member

    Joined:
    Aug 25, 2017
    Messages:
    691
    Location:
    So.Ca.
    The light that the op suggested works and it was as simple as can be.. just takes several hours over each part of the yellowing areas affected. I placed the light into a box and I also positioned a small fan toward the screen as I did notice the light will get the glass fairly hot.
     
  6. Country Roads

    Country Roads Member

    Joined:
    Jul 18, 2017
    Messages:
    81
    Location:
    WV
    jeffb - I'm trying your box and tape method. Roughly speaking, how long did your lamp sessions run? How much total time under lights?
     
  7. jeffb

    jeffb Member

    Joined:
    Oct 31, 2015
    Messages:
    49
    Location:
    California
    Probably around 4-6 hours per area of the screen, I was experimenting so I did not just set it and leave it, I ran it for a couple hours, checked on it, moved it to the other part of the screen, a couple hours, found it was working but not complete.

    Came back the next day and did it some more, directly over the yellow part on the top of the screen this time. I was trying to see how directional the lights were and if more direct exposure was "better" than the off access exposure it was getting if I lit up more of the screen.

    Interestingly now that its done and the yellowing is gone, I think that the light is not that directional, because of the shape and size of the box I was using I never really exposed the middle portion of my screen to direct light. It only got off access exposure or just the light leaking and refracting within the screen itself, BUT the yellowing in the middle portion of the screen was cured anyway.

    I think you can probably concentrate the light more closely and on axis over the yellowing areas to speed things up but I found that to not be necessary as 4-6 hours of general exposure seemed to get the job done and was easier to rig up, less likely to expose other parts of the car to excessive UV, etc...

    From others experience here it seems I may need to do this a few times to completely cure the issue long term, but now that I have my "tool" in my garage that is easy enough to do.
     
    • Informative x 1
    • Like x 1
  8. GoBlue88

    GoBlue88 Member

    Joined:
    Apr 1, 2014
    Messages:
    829
    Location:
    Carlsbad, CA
    Dropped it off at the San Diego service center at 10am today. Had it back by 3pm (in addition to the screen, they also took care of the two outstanding recalls on my car: airbags and steering bolts). Yellow border is gone and the screen looks great. Total charge: $0.
     
    • Like x 5
  9. SucreTease

    SucreTease Teslarian

    Joined:
    Jul 11, 2017
    Messages:
    658
    Location:
    Huntsville, Alabama
    I kept reading this trying to figure out what you meant. Did you mean off-axis exposure?
     
  10. jeffb

    jeffb Member

    Joined:
    Oct 31, 2015
    Messages:
    49
    Location:
    California
    yes, the way my box was set up the screen directly under the light is getting exposed at a 90 degree angle. While the screen towards the edge of the box I used as a shield would be exposed at about a 45 degree angle. I though there might be some trouble from this (with the 45 degree portions getting less exposure, needing more time) but I didnt really see any evidence of that, the yellowing seemed to be eliminated fairly evenly regardless of where it was compared to the UV light. However its just a one time anecdote and I wasn't specifically looking for/testing for that, so of course your results may vary!
     
    • Informative x 1
  11. xKRSx

    xKRSx Member

    Joined:
    May 5, 2018
    Messages:
    77
    Location:
    California
    As straight forward as this seems, there must be some sort of user error on my part. After about 9 hours of exposure (3 sessions for 3 hours at a time) using the same light from Amazon listed by the OP the yellow band actually appears to be worse off and is darker now. Wife and kids all seem to agree that it looks worse as well. Long shot here but does the yellow band get darker before it fully cures after which point it will then fade away?
     
  12. rooter

    rooter Member

    Joined:
    May 13, 2018
    Messages:
    636
    Location:
    Edmonds, WA
    I've just bought the 80w model. Hope the heatsink is adequate.
     
    • Informative x 1
  13. ucmndd

    ucmndd Well-Known Member

    Joined:
    Mar 10, 2016
    Messages:
    5,380
    Location:
    California
    That’s a bummer. :(

    No, I never noticed mine getting darker.
     
  14. KArnold

    KArnold Member

    Joined:
    May 21, 2017
    Messages:
    445
    Location:
    Columbus OH
    Some cars (like mine) had the SC UV method and it failed. Ended up replacing the screen.

    Would be nice to know exactly what "failed" - I would assume that means the yellow border did not clear but it's only an assumption. Different conditions, perhaps different results/symptoms.
     
    • Informative x 1
  15. xKRSx

    xKRSx Member

    Joined:
    May 5, 2018
    Messages:
    77
    Location:
    California
    hmm sounds like my condition where the yellowing was only getting darker with the UV treatment. Must have been a point of no return with the yellowing. How much was the screen replacement and labor total? Thx
     
  16. MP3Mike

    MP3Mike Well-Known Member

    Joined:
    Feb 1, 2016
    Messages:
    13,634
    Location:
    Oregon
    Out of warranty I think Tesla charges ~$1,200.
     
  17. TonyT

    TonyT Member

    Joined:
    Nov 5, 2018
    Messages:
    776
    Location:
    Orange county, CA
    I see on my test screen the glowing is there around the edge, similar to yours even though it has not yellowed. I was curious to see if my liquefied screen could cure the glue back to solid but it has not with over 24 hours of exposure to the area that I tried to solidify the bubble to a side unsuccessfully.
     
  18. KArnold

    KArnold Member

    Joined:
    May 21, 2017
    Messages:
    445
    Location:
    Columbus OH
    Mine was free - had to go through arbitration in the USA though to force Tesla to treat it as a warranty item

    In May I was quoted $1389 to replace if I paid for it.
     
    • Informative x 1
  19. jeffb

    jeffb Member

    Joined:
    Oct 31, 2015
    Messages:
    49
    Location:
    California

    Yeah, interesting. Looks like there may be more than one possible cause of the yellowing. For those of us who had the speculated "incomplete adhesive curing" the UV light seems to be an effective solution.

    But if the cause is something akin to "weather exposure" degradation (or a lack of protection against exposure), more UV may not be the answer. Glad to see the price coming down on the parts though, although still not cheap, at least you are not going to go into foreclosure on your house if you have to go the replacement route out of warranty.
     
  20. Blue X90

    Blue X90 Member

    Joined:
    Dec 17, 2017
    Messages:
    13
    Location:
    New York
    #100 Blue X90, Dec 28, 2019
    Last edited by a moderator: Jan 15, 2020
    This thread has been very informative and lead me to my own solution for $14.99.

    I found this device that has 4 UV bulbs at 365nm:

    https://www.amazon.com/gp/product/B06X8ZVJSS

    20191217_201055.jpg

    I removed the lower sides of the bottom cover and lined the inside with foil HVAC tape.

    20191217_201122.jpg 20191217_205114.jpg 20191217_205143.jpg 20191217_205227.jpg 20191217_205347.jpg

    I placed the box on 1 quadrant of the screen at a time for 13 hours. I noticed the yellow fading at 5 hours then left it on overnight. Possibly it didn't need att 13 hours. The temperature in my garage was 65 degrees F. The screen was slightly warm but not hot. The size of the box did not let light out so I didn't need to cover anything.

    20191218_172717.jpg

    Here are the before and after pictures:

    20191218_125938.jpg 20191224_124556.jpg

    My car is a 2018 X100, manufactured 10/18. Yellow border appeared 7/19.

    I don't know if this will work for anyone else and if you try this method, you do so at your own risk.
     
    • Like x 7
    • Informative x 3
    • Helpful x 1

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC