Hello everyone! Long time no post, i hope everyone is doing well. My cars having a little bit of a problem with the touch screen. The A/C works fine, Radio, CD, CDC works fine. But the screen comes on after 20-30 minutes after driving. Then if i start the car up the next day it does the samething. It was at the dealer for a week and they said it worked every time they started the car even on cold start ups. Any ideas? Software or hardware screen problem? thanks!

 

The screen is controlled from the NAV DVD unit in the trunk. You may well have to end up replacing the unit.
Mellow

 

Might be damp / wet in there.

 

I just removed the nav DVD unit from the trunk to match up part numbers. Would the used (New) unit have to be out of a S-type? Or would one from the same year X-type or XJ work?

 

Is your car a 2005 Model year STR?

If so please add this detail to your forum signature. (See the first line in my signature below for an example.)

I think the nav unit from VIN M45255 onwards is indeed the same part number in the XJ and X-type. Just to make sure if you go to the official Jaguar parts catalogue it will give you all the previous part numbers that have all been superseded to C2S48025. (See link below)

The units for the japan market are not the same!

https://parts.jaguarlandroverclassic.../brand/jaguar/

Mellow

 

Sorry about that! I'll add that to the signature right now. Yes its a 2005 Stype R 4.2. Thank you for the link, i double checked the part number and made sure i ordered the right replacement unit. I didn't see any signs of water damage. It's actually scary how new the unit looks for being made in December of 2003!

 

Does the shop have it indoors overnight before trying it?

As LCD screens age they can suffer from a slow start up that gets worse as the ambient temp.and humidity change and tends to be intermittent until it fails completely. It's much worse if the LCD has a florescent backlight than the newer LED backlit panels,
Also the florescent tube(s) and/or driver circuit may be going out with age.

If you put a flashlight right against the screen can you see any graphics? If so it's the backlighting, if not it's either a bad LCD or no signal from the Nav. unit.

It being from 2005 I would guess that the odds of it being anything but florescent are pretty much nil, it's about 5 years too old for LED backlighting though a few small displays like cell phones, did use incandescent backlighting but generally only on very small (by today's standards) screens.

I run into both problems a lot at work on older video gaming machine monitors. We still have over a hundred 20+ year old CRTs that I have to keep alive The LCDs are the same as the standard computer monitors but the electronics have encoding so just popping a non specific monitor in won't work. They're $US800-1500 a pop!

After some trial and error (what cold it hurt? it's already broken) I've developed the skills to replace an LCD screen without destroying it in the process and/or replace the florescent tubes with LEDs. Sacrificing a new $100 monitor and $3 worth of LEDs is a much cheaper and faster option.than ordering a new one.

I wouldn't suggest trying this at home. Even with 40 years experience repairing the unrepairable I couldn't guarantee it can be fixed without having it on my bench first. A used one from scrap yard is probably your best bet.

If you do replace it I'll buy the broken one from you so I can see what makes it tick. Eventually all those screens will fail and I could use some extra retirement income

 

I checked with the flashlight and i don't see anything. The more i think about it i don't even think the dealer looked at the car. They just wanted to sell me tires -_- They told me every time they started the car it worked and i know that's not true. Plus the service advisor won't even call me back to make a appointment. Even when the car was ready to be picked up the service advisor insisted they have the car delivered to my house. Red flags all around. If its the touch screen sure you can have it!

 

Intresting comments from SDCentaur.
I have not known any reports of the actual screen failing on an s-type, but reading the post it could be posiable that this may be your problem. I do hope you have not purchased the NAV unit for nouthing! I guess you could always sell it on again if it does not sort out your problem.

However I have known several reports of the NAV units failing on the s-type.

Mellow

 

Me too lol. Even if nobody buys it, it never hurts to have a spare! It should be coming in the mail this Wednesday or Thursday. I'm really excited to see if a deferent unit fixes the problem.

 

Update: Problem fixed! It was a faulty screen/center console unit. I just installed a new/ "Used one"

 

Glad you got it fixed As these cars get older the "dead screen" may become more common, that's why I'd like to get my hands on a "dead" one. If they can be repaired those who like to keep things "original" would have one less thing to worry about.

Mine has the old gas discharge displays which have their own issues as they age. I'll burn that bridge if/when I get to it.

It's been my experience that pre 2016 or so LCD screens start to fail after about 10 years of 24/7 use in a controlled environment. With the number of machines my company has about 1/2 of my time for the last 3 years has been dealing with LCD issues. Extremes in temperature are hard on the panels, they can de-laminate or even crack. Some of ours are installed outdoors (smoking rooms) and exposed to temp. swings from -30F to over 100F ambient. Not surprising that those have failed within a year of being installed. The interior of a car gets nasty hot so the electronics behind the dash are already hot before being turned on so I'd expect that the majority of the damage comes from hot startups..