Anyone want to take a stab at diagnosis? Screens blank, no blinkers, no high beams, but "all else" works...

[shaefer]

[Edit: 2017 Model S, FSD and upgraded to MCU2, HW3.0, and the newer cameras]

Things that DO work: car runs and drivers, door handles, frunk and trunk open with key fob, interior lights, windows, seat motors (manual only)
Things that stopped working suddenly: screens (center and dash) and basically everything associated with MCU, and ALMOST everything on the steering wheel and steering column. Exceptions to that are the horn works and I can turn on the wipers. Headlights come on automatically but no brights and no blinkers.

SO...while my initial thought with the dead screen was a dead 12V battery, now I'm pretty sure the battery is fine and this is something quite different. Any ideas?

 

[EVRider-FL]

Probably time for service, but try a power off reset if you haven’t already.

 

[fholbert]

[Edit: 2017 Model S, FSD and upgraded to MCU2, HW3.0, and the newer cameras]

Things that DO work: car runs and drivers, door handles, frunk and trunk open with key fob, interior lights, windows, seat motors (manual only)
Things that stopped working suddenly: screens (center and dash) and basically everything associated with MCU, and ALMOST everything on the steering wheel and steering column. Exceptions to that are the horn works and I can turn on the wipers. Headlights come on automatically but no brights and no blinkers.

SO...while my initial thought with the dead screen was a dead 12V battery, now I'm pretty sure the battery is fine and this is something quite different. Any ideas?

As long as the horn works, drive on!

 

[IslandHydro]

Happened a few times to my 2015 p85d shortly after the MCU2 upgrade. Dual button reboot fixed it each time. Hasn't happened in the last few months so I'm hoping it's something that has been addressed through a software update.

 

[cbdream99]

Try hard reset and see if it works, otherwise schedule a service.

 

[shaefer]

Probably time for service, but try a power off reset if you haven’t already.

Re: power off reset - is that rebooting with the scroll wheel buttons and/or top selector buttons on the steering wheel? If so, I've tried that with still no signs of life after about 2 minutes.

 

[livesmith]

Re: power off reset - is that rebooting with the scroll wheel buttons and/or top selector buttons on the steering wheel? If so, I've tried that with still no signs of life after about 2 minutes.

Next step is probably disconnecting 12V and I believe the fireman's loop.

 

[shaefer]

Happened a few times to my 2015 p85d shortly after the MCU2 upgrade. Dual button reboot fixed it each time. Hasn't happened in the last few months so I'm hoping it's something that has been addressed through a software update.

Unfortunately reboot doesn't seem to do anything, either with the scroll wheel or the top selector buttons. Service is scheduled.

 

[brainhouston]

With MCU 2, IC is just a screen so that's why they both off
Since everything that relates to MCU is not working that most likely points to dead MCU
Maybe small chance fuse for MCU blown

 

[EVRider-FL]

Re: power off reset - is that rebooting with the scroll wheel buttons and/or top selector buttons on the steering wheel? If so, I've tried that with still no signs of life after about 2 minutes.

No, that's not it. Here are the instructions, copied from the manual:

1. Shift into Park.
2. On the touchscreen, touch Controls > Safety > Power Off.
3. Wait for at least two minutes without interacting with the vehicle. Do not open the doors, touch the brake pedal, touch the touchscreen, etc.
4. After two minutes, press the brake pedal or open the door to wake the vehicle.

 

[cbdream99]

No, that's not it. Here are the instructions, copied from the manual:

1. Shift into Park.
2. On the touchscreen, touch Controls > Safety > Power Off.
3. Wait for at least two minutes without interacting with the vehicle. Do not open the doors, touch the brake pedal, touch the touchscreen, etc.

I read OP meant the MCU and instrument cluster is dead or blank...

 

[shaefer]

I read OP meant the MCU and instrument cluster is dead or blank...

Indeed, blank screen, presumably dead screen. I say presumably because I did "test" to see if maybe it just lost backlighting (had that happen to a computer recently). I tapped all around the bottom left corner to see if anything would change with the AC, but I got nothing.

I did read about the LVDS cable, so maybe that? I'm sort of grasping at straws until service can take a look.

 

[brainhouston]

If ur screen is dead but MCU still functional then voice commands should work
Also I believe app access also dependant on MCU... Can u control heater from app?

 

[shaefer]

If ur screen is dead but MCU still functional then voice commands should work
Also I believe app access also dependant on MCU... Can u control heater from app?

No. As far as the app is concerned the car is not reachable.

 

[SigRed12]

@shaefer, Has your issue been resolved? If so, what fixed it?