I've probably posted in this thread at some point. I had an AppRadio2 do the same thing. It was out of warranty. I moved on with another head unit.  

Pioneer has changed the construction of its AppRadio Screens. I was told directly from Pioneer that the AR4 screen is not made the same way as the AR2 screen was. 

I would never expect Pioneer to fix all the broken AR2s. That's ludicrous. They're out of warranty. The sceens failed after that period. It's an OLD model. You're not entitled to having it fixed for free. Let's be accountable for our own decisions.

well, there are sellers on ebay selling LCD's new for $75 for the appradio 2.  if i had any idea how to change it out i would buy one

I wrote an email to Pioneer suport with the same issue and they don't even responded. they just don't give a crap. I willing to contac consumer affairs and let tem know about the problem with the radio's screen. if we do all at once, we may get our radios fixed. 

the exact same thing happened to me as everyone else in this thread.  the photos posted look exactly like my radio.

 

i ended up buying a used appradio 2 off of ebay for $100. had to pay to then have it installed as well since i have no skills at all for installation.

 

 

well, the used one i bought 2 of the buttons will not work on the radio the volume down and the back button.  now two months later all of the physical buttons do not work anymore.  if i press any button on the radio i lose all touch and steering wheel control the unit completely locks up.  makes no sense at all.  luckily i have steering wheel controls that i can use but that is going to take some getting used to.

 

pioneer really should be fixing these units for free

found a parts only appradio on ebay with a good screen.... you have to replace the whole crystal touch screen with buttons and all. the LCD was fine.

sigh..

Wondering if anyone has found a solution for the screen issue? Not in the mood to ship it out for repair; has anyone tried the blow dryer tip?

BLOW DRYER DOESNT WORK.... sigh... as my post said, you have to replace the whole front liquid crystal screen and button panel. Its one part.

Can I get some clarification on the cause of this problem (apart from poor design and construction). Is it a case where the heat inside the car is causing this to happen? Mine didn't start coming apart until early summer and has got progressively worse as summer continues, however other comments in other forums have suggested it has happened to then during cooler periods. In Australia the replacement costs around $150 but I'm not going bother if the problem is just random or age related.

The problem is caused by a loss of adhesion or delamination of the inner & outer screen, when this happens you usually have a loss of response in the affected area with no physical signs of a defect. The app radio screen issue is really unusual due to the fact you can actually see the affected area.

The last resort repair method only works on resistive touch type screens.

The last resort repair attempt method is to remove the touch screen from the unit & separate it from the lcd screen, then place the glass screen on a perfectly clean flat surface, apply heat over the entire screen with a hair dryer & gently apply slight pressure on the the screen & repeat as necessary, I use a wide rubber roller (block printing type) or you could use a rolling pin with a thin piece of cloth to protect the screen.

Well add me to this list as mine started about 2 months ago, I take it that no one has a solution for this? I can't seem to find a replacement screen or anything. This is just sickening.

So I live in Arizona where it gets very hot during the summer and you would expect this to happen with extreme heat, funny thing was, it happened to me during the winter with the cold. It started on the right side of the screen and within a week spread all across the screen. Touch was still working, but ended up purchasing a new replacement touchscreen from Pioneer. I'm registered on Pioneer's parts site so having the service manual to be able to order the parts by it's part number came in very handy. I did call Pioneer regarding this and basically was told to kick rocks.... thanks Pioneer....

Care to share the price of the new screen? Might want to get one if its inexpensive.

I just saw a post on another forum with a picture of this happening on an AppRadio4! I guess even if the AR4 screen is made differently than the AR2 (source: Pioneer email), it didn't do much good. 

http://appradioworld.17289.n7.nabble.com/AppRadio-4-Strange-marks-across-entire-screen-td1196.html#a1199

in my opinion, the heating problems arise because the speakers are not compatible with the unit. OEM speakers have 2 ohm and unit drive out minimum 4ohm, if you listen at high volume streaming via Bluetooth result is very hot. I have also a problem with touch, but diferent- not respond at all, after i dont use this unit 1 year. I put it back and no respond.

now after 2 year the SPHDA 100 have the same problem on the screen!!!!!

in my opinion, the heating problems arise because the speakers are not compatible with the unit. OEM speakers have 2 ohm and unit drive out minimum 4ohm, if you listen at high volume streaming via Bluetooth result is very hot. I have also a problem with touch, but diferent- not respond at all, after i dont use this unit 1 year. I put it back and no respond.

This is a very interesting thought! Which I never thought about the heat from the actual unit causing the issue. However, I noticed this issue following hot summer days in Philly. Now my Appradio 2 is almost impossible see in the sun, but still works flawlessly. 

Who has the links for screen replacement? I wouldnt mind doing this myself if its doable.

Do you have the touch screen for sale, I have the same problem, but my screen no longer serves in its entirety

aaaunnnd now my wife's radio (in the 350Z) has the spots...

Sigh...

If AR4 still has the problem  - then well, Buh Bye to Pioneer! You have lost me forever...

But! My oldest unit (7+ years installed) in my Lancer is fine - no bubbles whutsoEva'...  [shrug]

Since the AppRadio line doesn't seem to be developed by Pioneer anymore (rumors of the AR5 are quite stale), I'm looking at some of the other radios supported by "AR Unchained" (the 'droid app I use - the only reason I'm still looking at Pioneer models) and I have to wonder if any of those double-DIN touchscreens are failing, too.