Mk1 C5 Screen issues

[mickthemaverick]

Further to my previous answer on the insurance I will post the info on the insurance renewal thread.

[jamescarruthers]

I have retaken posession of my sister's C5 and on the drive down from the north to Cambridge the screen began to flicker and has now gone off entirely (it has been a little yellow for years before) takng the remote radio controls with it.

Other than EPS Elektronok in Germany https://www.eps-elektronik.com/citroen- ... ystems.php does anyone have a source for where I may get this repaired in the UK? I feel spending £150 for a likely equally ancient one eBay via Lithuania will end up in disappointment.

[GiveMeABreak]

There's only one place I know in the UK, link to post in the telematics Forum:

viewtopic.php?t=60781

[jamescarruthers]

There's only one place I know in the UK, link to post in the telematics Forum:

viewtopic.php?t=60781

Thank you. I'll give them an email

[aspire_helen]

Before, or in addition to, replacing/repairing the 22SY451 see my current thread on the the void behind the dashboard being heated by hot air leaking from the driver's centre fascia duct due to the soft foam seal perishing. Check behind the instrument panel, low left, for the 10mm gap left by the failed seal. Its like a third hot air duct. In December my MFD went blank during a 4 hour motorway journey in freezing temperatures with hot air on continuously. I reached behind the instrument console (I keep it loose) to check the cooling fan was running, and was amazed how hot it was inside the dashboard. It was then I discovered the hot air leak. Even my additional fan and heat sink on the CPU could not cope with sitting in 40+degC air from the leak. I assume it was an over-heat cut out, because it started working again a few days later. I am experimenting with fitting a Peltier-effect refrigeration chip to the CPU with a digital temp controller. It might seem a faff, but its worth it to extend the life of the ECU.....cos the car ain't the same without it and its MFD screen!
By the way, I also removed some of the housing around the satnav unit to aid its cooling.

[jamescarruthers]

Before, or in addition to, replacing/repairing the 22SY451 see my current thread on the the void behind the dashboard being heated by hot air leaking from the driver's centre fascia duct due to the soft foam seal perishing. Check behind the instrument panel, low left, for the 10mm gap left by the failed seal. Its like a third hot air duct. In December my MFD went blank during a 4 hour motorway journey in freezing temperatures with hot air on continuously. I reached behind the instrument console (I keep it loose) to check the cooling fan was running, and was amazed how hot it was inside the dashboard. It was then I discovered the hot air leak. Even my additional fan and heat sink on the CPU could not cope with sitting in 40+degC air from the leak. I assume it was an over-heat cut out, because it started working again a few days later. I am experimenting with fitting a Peltier-effect refrigeration chip to the CPU with a digital temp controller. It might seem a faff, but its worth it to extend the life of the ECU.....cos the car ain't the same without it and its MFD screen!
By the way, I also removed some of the housing around the satnav unit to aid its cooling.

Thanks for the details on the heating system cooking the display processor. Funnily enough, the dispay did start flashing mid-trip from Newcastle to Cambridge last week and hasn't came back on after dying near the end of the trip.

Can I get to the gaps in the heater pipes in the footwell or do I need to now take the dashboard apart to get to the pipes?

[aspire_helen]

We are not talking "heater pipes", but the foam seal at the interface between the upper output of the heater unit and the dashboard which houses the ducts to the fascia and windscreen vents.
The only access to the drivers side centre fascia duct is from behind the instrument panel. Which is a good thing because the instrument panel is easy to remove and gives direct access to just the right part of the seal. Of course, it is also the only access to the 22SY451 itself.
If the passenger end of the seal has failed, air will be leaking into the void behind the glove box. If the sections of the seal between the fascia and screen ducts has perished, there will be leakage between them...no big deal.
To replace the seal in toto requires removal of the dashboard, in effect to lift the dashboard up off the heater unit (which remains in place).
The footwell will not give access - certainly not to the drivers side, and I suspect neither to the passenger side either.
By the way, if you need hot air you can de-select the fascia vents by selecting screen and feet only.
Oh and while I think about it, I rarely carry rear passengers so I blocked the rear passenger feet ducts where the exit behind the seats...it increases the airflow to the front feet vents, a bit. I hope that helps.

[jamescarruthers]

We are not talking "heater pipes", but the foam seal at the interface between the upper output of the heater unit and the dashboard which houses the ducts to the fascia and windscreen vents.
The only access to the drivers side centre fascia duct is from behind the instrument panel. Which is a good thing because the instrument panel is easy to remove and gives direct access to just the right part of the seal. Of course, it is also the only access to the 22SY451 itself.
If the passenger end of the seal has failed, air will be leaking into the void behind the glove box. If the sections of the seal between the fascia and screen ducts has perished, there will be leakage between them...no big deal.
To replace the seal in toto requires removal of the dashboard, in effect to lift the dashboard up off the heater unit (which remains in place).
The footwell will not give access - certainly not to the drivers side, and I suspect neither to the passenger side either.
By the way, if you need hot air you can de-select the fascia vents by selecting screen and feet only.
Oh and while I think about it, I rarely carry rear passengers so I blocked the rear passenger feet ducts where the exit behind the seats...it increases the airflow to the front feet vents, a bit. I hope that helps.

That does help, thank you. I think I have found one for sale on eBay (although the seller appears very untrustworthy!) so will have a look for this gap on the heater unit as you describe when I have the instrument cluster out to replace the display processor, if it does turn up working. I will not put it back in to be cooked and hopefully do the repair as you describe.