Welcome to Tesla Motors Club
Discuss Tesla's Model S, Model 3, Model X, Model Y, Cybertruck, Roadster and More.
Register

UV Worked great on my badly yellowed screen

E McSquared

Member
Jul 19, 2019
5
18
Houston, Texas
The yellowing is caused by atmospheric oxygen permeation into one of the LCD layers from the edge, which isn't completely sealed. Space Shuttle cockpit displays had the same issue, if it makes anyone feel any better. The UV reconditioning is pretty nifty - I had not heard of that before.
 
  • Informative
Reactions: pilotSteve and .jg.

rgedad

Member
Apr 6, 2018
63
70
Fort Worth, TX
Had my 2018 MX (received 6/2018) 100D yellow screen issue fixed via the UV Process just a couple of weeks ago at the Dallas SC. I live about 45 minutes away from the service center. I did not know the process took about 3 hours when I went to the appointment. They did offer an UBER ride home while they did it, but I did not want to spent 1.5 hours in traffic. Luckily I had my laptop in the car to keep me occupied while I waited, and there was a fast food place down the block to keep my belly full while I waited.
There was a slight chemical odor in the car when I got in, like curing resin, but it quickly went away by the next day.
They did not charge me anything - so it must have been on warrantee.
 

tbee

Member
Nov 14, 2018
50
34
Netherlands
I went to a lawyer to check my assumption that tesla's position is bs, and he laughed and agreed. So it is covered, at least here in the Netherlands, but we are more conservative than the US.

The fix really works, the only question is if it will last, because it only treats the symptom, not the cause. I already said that if it does not, I will declare this a faulty repair and still claim warranty.
 

RedOctober

Member
Oct 31, 2017
306
293
Earth
I had posted this in the main ‘yellowing screen’ thread, but think it’s worth posting here too. I had the service performed at the Syosset service center. My screen was in really bad shape as I mentioned above. The service was hugely successful and my screen looks 100%. I may be imagining this, but I’d swear the screen looks brighter, not just the edges, but the entire screen.

It’s really amazing considering how skeptical I was when I first heard of this approach, but it really works. This is absolutely preferable to screen replacement since most of those wind up yellowing again within a short time anyway.
This may be the way to go because they replaced my screen a year ago and it’s already yellowing. Now to find out if this process can be a DIY project.
 

CBPfromTN

Member
Dec 16, 2017
429
156
Nashville, TN area
Maybe I have missed the answer to this but does anyone know what causes the touchscreen to "yellow?" Could it be parking it in the hot sun all day or something else? I can't think of anything else but the car sitting in the hot sun all day, day after day, week after week, etc. OR is there another known cause? Thanks!
 
Jul 23, 2019
38
17
Canyon Lake, Texas
AA5D2086-9EED-4199-A62B-B99E67168CE5.jpeg
51ED6ABC-3B2C-439F-8D47-BB7B988DE920.jpeg
My 2016 Model S is in the San Antonio service center right now getting the UV fix and a few other warranty items.

Here is the before picture. I’m excited to see the results tomorrow when I pick it up!
 

xbox4me62

Member
Feb 8, 2017
117
145
SF bay area
The yellowing is caused by atmospheric oxygen permeation into one of the LCD layers from the edge, which isn't completely sealed. Space Shuttle cockpit displays had the same issue, if it makes anyone feel any better. The UV reconditioning is pretty nifty - I had not heard of that before.

I'm not quite sure if it's due to oxygen into the LCD in tesla's case. UV would not be able to reverse that issue if oxygen did get into the polarizers etc.

It looks like incomplete cure of the LOCA (liquid optically clear adhesive) that's used to bond the LCD to the touch panel and subsequently the cover glass. The photoinitiators in the liquid OCA can oxidize over time if they haven't all been consumed. The yellowing just looks like incomplete cure due to bad QA (unsurprising). It's probably a 310-340nm UV led with high intensity. For anybody that's interested here are some of the common tools to cure the UV liquid OCAs https://dymax.com/light-curing-equipment/
 

Skotty

2014 S P85 | 2020 3 P19"
Jun 27, 2013
2,440
1,752
Kansas City, MO
I'm not quite sure if it's due to oxygen into the LCD in tesla's case. UV would not be able to reverse that issue if oxygen did get into the polarizers etc.

It looks like incomplete cure of the LOCA (liquid optically clear adhesive) that's used to bond the LCD to the touch panel and subsequently the cover glass. The photoinitiators in the liquid OCA can oxidize over time if they haven't all been consumed. The yellowing just looks like incomplete cure due to bad QA (unsurprising). It's probably a 310-340nm UV led with high intensity. For anybody that's interested here are some of the common tools to cure the UV liquid OCAs https://dymax.com/light-curing-equipment/
Tesla has suggested that the UV fix is not permanent, but maybe it was just CYA language just in case. Because if it's an incomplete cure, it seems like the UV treatment should be a permanent fix, and I really hope that's the case.
 

Talguy

Member
Oct 25, 2018
19
20
Tallahassee
The yellowing is caused by atmospheric oxygen permeation into one of the LCD layers from the edge, which isn't completely sealed. Space Shuttle cockpit displays had the same issue, if it makes anyone feel any better. The UV reconditioning is pretty nifty - I had not heard of that before.

You probably have worked on Space Shuttle program b4
Anyway, this yellow around the edge of LCD also happens on smart phones before. An iPhone forum discussion Apple replaced LCD of iPhone 5 (with yellow or green edge lcd) five years go.
User mixanikosgr in this forum mentioned UV fix (4th post from the top) for smart phone lcd back in 2015:
Yellow tint on edge of screen
 

Talguy

Member
Oct 25, 2018
19
20
Tallahassee
I digged a little more and I found this site talking about UV causing yellow color on plastic. To fix this, Retr0bright technique was developed. The technique uses more UV (!!!) and Hydrogen Peroxide. I wonder if Tesla engineers are using the same concept of the technique and also if they use Hydrogen Peroxide "gel" in addition to the UV light.
Yellowing: The Plastic Equivalent Of A Sunburn
 

Talguy

Member
Oct 25, 2018
19
20
Tallahassee
Tesla has suggested that the UV fix is not permanent, but maybe it was just CYA language just in case...
It's exactly CYA language, ... CTA language in this case. Anyone hardware guy who is working in engineering should know this. It simply because Tesla does not have enough time to see the long effect of the fix. Tesla engineers probably came up this fix (bandaid solution) at beginning of this year. After a few months of beta test, now they are sending the tool to every sc. Since no one else have done this before, they just don't know how long the improved result will last. The core of the problem is at the LCD factory/supplier. I bet Tesla is having a headache with their LCD suppliers.
 
  • Like
Reactions: CSFTN

Uncle Paul

Well-Known Member
Nov 1, 2013
6,286
6,826
Canyon Lake,CA
Seems that Tesla latest policy is try the UV treatment first. If it does not cure the problem, they will replace your screen under warranty.

Problem seems that even if they replace your very expensive screen there is always the possibility that it will yellow as well. Don't think they are doing any more 2nd replacement.

Field reports seem to indicate that the UV treatment is pretty effective.
 

energy7

Member
Dec 8, 2016
108
65
Bay Area, CA
I chatted with my local service center today. They stated it would cost $40 for a one time courtesy fix for the yellow band. What I don't like about this statement is: 1) They say it's a one time courtesy. How do we know how long this 'fix' will last? I don't want any limitations on future fixes and 2) They want to charge me $40 for the fix. This is unacceptable to me as this is obviously a defect, not a 'cosmetic' issue. My car is less than three years old and always garaged, rarely parked in the heat. Yet, I have the yellow band. I have filed a case with NCDS for an Arbiter to be assigned. We shall see what happens next.
 

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
Top