PCM Display Problem

[ekstroemtj]

I try already the search but couldnt find a post which is describing a similar problem.

My car is a Turbo S from 2005.

Already from the day i bought this used machine i had Problems with the PCM. Audio works perfect but the Display was showing nothing else than strange colours and signs. I was planning to send the unit to a Special repair shop soon.

But SURPRISE today when i started the car and switched on Radio the Display was ok. I switched from Music Channel to Channel to navi and so on. Always a display how it should be. First time since i own this car. But when i pushed the cd Button again :-(

Strange display like Before . Maybe somebody can give me a hint whats going on here?! Thank you

[ekstroemtj]

PCM Display

[wvicary]

Difficult to say what the problem is but it is internal to the head unit. The successful repair rate is low on such items so might be best to replace with a used unit or aftermarket.

[rik881]

A used one might have to be reprogrammed by dealer. You could send it in for repairs i guess. 

Edited December 11, 2014 by rik881

[ekstroemtj]

Thank you for your advice. Looks like i have to give it away. I though maybe i could disconnect and see if there is a wire problem.

Thank you

[bigbuzuki]

You could try replacing the screen yourself.

Here is a link from someone who has done it.

http://www.renntech.org/forums/topic/30230-porsche-pcm-21-screen-replacement-tutorial-video-pics/

[ekstroemtj]

Thank you. Maybe i will give it a try

[PorschePower06]

My 06 S just started having issues last week.  Boots with the logo then turns into all lines all button functions work.  Mine will also shut down randomly after 15 to 30 minutes.  Saw the screen replacement process looks pretty straight forward although with it randomly shutting down worth the cash for the screen?

[bigbuzuki]

Sounds like you have 2 seperate defects.

[dammad]

For the original poster. It is possible the firmware is corrupt. You might check the version and see if you can do an upgrade.

[ekstroemtj]

For the original poster. It is possible the firmware is corrupt. You might check the version and see if you can do an upgrade.

Thank you dammad for your advice . But how can i find out which Version i have?

Thankx

[hahnmgh63]

With the PCM on press the Main & Trip buttons simultaneously to go to the software versions page.

Edited January 10, 2015 by hahnmgh63

[ekstroemtj]

I would like to ask again your opinion . I almost bought a new display for some hundreds and decide to take out the Unit before to order . I disconnect and reconnect the old display. What i found out or lets say what i believe the problem is not the display itself. When i install the Unit back in place and switched on it was working. Depending on how much i push the Unit on the left side. I guess the problem is somewhere else. Could it be possible that this a ground problem or something else. The Unit is reacting on some kind of Force. Now it is inside the place where it should be but i didnt let it slide in completely . Any advise is welcome.

[ekstroemtj]

Pics

[dammad]

Sounds very much like an poor connection to the screen internally by the last screen shot seems to imply communication problems on the MOST bus since there are exclamation marks everywhere. Perhaps two different problems.

[ekstroemtj]

Thank you very much. Should i bring it to Porsche or to some special electronic shop?

[dammad]

You'll pretty much only be able to get a replacement since so few places fix things these days. Probably better to get a modern unit from kenwood/alpine and a factory look surround. If you want to maintain a complete factory look you might be able to get a equivalent on eBay and have porsche program it.