Cheers for that. I did read about this resistor in another thread. I'd like diagnose the fault rather than just start swapping things over. I'll see if I can find any clues from the Citroen service website next. A wiring diagram would be useful. Then I can work out which bits haven't got power that should have. Citroen e-C4 with 1 year and 5 months. Screen stop work#stellantis #citroen #ec4 #psa #problems#problemas #screen NigelTullett Discussion starter. 268 posts · Joined 2021. #1 · Oct 2, 2021. Hi - just taken delivery of ex demo C4e, the My Citroen app is telling me there is a touch screen and nav map update to install, have been trying most of yesterday following various instructions! The instructions refer to usb, but the car also has a usb c connection While the car is off, hold the power and the eject button. Press your CD player's power and eject buttons down at the same time, holding them for about ten seconds. If your stereo has a "force eject" feature, it should spit out the CD. 3. If this doesn't work, start the car and try again. All the controls of the Citroën C4 Cactus are contained in a single screen. The 7" touch screen, with its 7 touch-sensitive 100% digital and 100% intuitive. All the controls of the Citroën The replacement screen in my car has remained working 100% through cold weather and plenty of use. Everytime I unlock the car I do still hold my breathe for a moment and check the screen illuminates correctly! I know Citroen were trying to find another solution (rather than screen part replacement). Finally upgraded to 5.43 last night. The firmware upgrade was successful. But the same issue still occurs where the touch screen is very slow to respond or will not respond when i touch any buttons. Sometimes the screen works ok when car is first powered on but then doesnt respo 282 Posted September 25, 2009 If you look at the back of the wireless touch pad you will see a little tiny hole. This is the reset switch. You will need to take a paper clip, or something the same size as a paper clip, put it in the hole and press the button. You will see the white Control4 screen and the keypad will reboot. rXTO.