Hi everyone,

I have a F940BT that i tried to update to 5.100 from 4.00. I followed the guide and instructions to the book.

Even followed a video from pioneer in australia. I did the 1. program ucom write and it ran the update twice before coming up with cs err.

I wasn't able to exit out of the update console. In the end i managed to get the head unit to turn off but now it will not boot up at all. No boot logo just a blank/black screen.

Does anyone know what i can do to revive the unit back up please? 

Many Thanks

Smurf

I'm 99% sure ur unit got bricked.

It's a software failure u got on your hands now so u got to get it fixed @ pioneer, or go back to where u bought it from and they will send it into pioneer for repairs.

sounds like exactly the same problem i just had. The unit is stick on Program Forced Write.

Followed the steps exactly so why will it brick. My screen is currently still on and seems i need to pull my battery to switch it off. Only reason i updated was to get the appradio working, now this.....

Update

Upon returning to my car, the screen was off and the system seems to be fine now. Did give me a lil bit of a scare. Don't even care if the firmware update completed, just glad to have it back.

Hi everyone,

 

I have a F940BT that i tried to update to 5.100 from 4.00. I followed the guide and instructions to the book.

 

Even followed a video from pioneer in australia. I did the 1. program ucom write and it ran the update twice before coming up with cs err.

 

I wasn't able to exit out of the update console. In the end i managed to get the head unit to turn off but now it will not boot up at all. No boot logo just a blank/black screen.

 

Does anyone know what i can do to revive the unit back up please? 

 

Many Thanks

 

Smurf

Hi all,

I've got the same problem as you... 

Bought a 2nd hand avic f940bt.

Installed the 2013 maps (worked perfect after that)

Bought and installed the ui202navi for iphone 5 connectivity

Read that I had to update firmware to 5.1.

Put the firmwared on formatted sd-card

Here I used write all ucom data, instead of write ucom data.

So i saw two rows updating. and it was successful.

Then I waited, and waited... nothing happened... so I thought. ok lets try the "write ucom data".

It started writing again, but repeated it several times with a CS error.

Then the unit would not shut off. at all, not even when I removed the key.

Then I tried to navigate, and when i doubletapped the screen, the unit shut off.

And not it has been staying off since... no life at all.

I tried disconnecting the battery, and checking the fuses... no reaction.

what to do? any suggestions?

Cheers!

Same thing happened to me - left car off for 5 hours, came back to it and no lights on unit

Would be interested to know if you were able to get it working? Also, anyone had any issues with the videos not working after upgrading to ios 7.0.4? Also having problems with the apps running. Just get a blank screen

Hi

I also have a F940BT which ws installed 5 days ago.

I tried to update to 8.05 from 8.02.

I did the same as Smurf786 - I followed the instructions and followed a video from Pioneer Australia - Published on Oct 20, 2013.

I ran the first ucom and it completed then it ran again and read "erasing" and the it read "cs err".

The screen stayed on for about 1 hour (I could not turn it off) and then turned off by itself.

I now have a black screen.

Does anyone have any updates?

Assuming I'm screwed, but any of you guys have updates on this?

Possibly a dumb question

But have you tried the super testmode or the hack to boot to wince?

Can you not just force reinstall the software from these options?

the same problem like my avic f940bt, 

I ran the first ucom and it completed then it ran again and read "erasing" and the it read "cs err".

The screen stayed on for about 1 hour (I could not turn it off) and then turned off by itself.

I now have a black screen no light. please help