First, let me start out this thread by saying that without this forum, I would be up a creek without a paddle, trying to fix this POS Avic F900BT. As has been a well documented problem with the screen going blank after the flash screen boots up. I spent many tedious hours reading all the various post concerning this issue and trying to follow the directions given by the OP, only to find many procedural errors, or very important information missing. I have copied and pasted the original posters thread into this one, and I will add or correct the info given. I will put all of my comments and updates in red.
Few days ago I tried to update my Avic F90BT when all hell broke loose. The update failed, and I couldn't get my unit working. It just kept on rebooting....even testmode didnt work. Here is what I did to do a complete wipe and reset back to factory 2.0
You will need a USB drive and 2 SD cards or 3 SD cards.
1. Go to viewtopic.php?f=34&t=24888 and download backup files for your unit. Save it on a formatted (FAT 32) 2GB or higher SD card or a UBS drive (recommended)
2. From above, copy the WINCEIMG.bin and WINCEIMG.cks to a different, formatted SD CARD (NO USB DRIVES)
This reboot procedure will return your head unit back to the original firmware 2.0
You will most likely want to update to the free firmware update to 2.006 in the near future, so this would be a good opportunity to download it from Pioneers website and store it on your computer for future use. The reason I would take this route is because you need the two files listed above and the files listed above did not work for my unit.
What I had to do was download the 2.006 firmware from Pioneers website under the support tab. Go to older models, find F900BT and click. Locate the update tab, then download the file.
http://pioneerelectronics.com/PUSA/Supp ... BT.Support
Once the file is downloaded to your computer, unzip it. Click on the folder F-series firmware update, then click on the folder LPUE080, then click on the folder PLT. You will find two files in this folder. WINCEIMG.BIN and WINCEIMG.CKS
Copy these two files onto a SD card, and when you go to the blue screen to update WINCE, these files will be used. Now, when you insert the SD card with the testmode folder and press reset, your head unit will reboot and launch the windows interface. It will remain on and allow you to continue will this aggravating process.
3. Use another formatted SD card for testmode file. See viewtopic.php?f=32&t=25329
The file on the above post is corrupt. You can find a working one here: viewtopic.php?f=32&t=25329&start=30#p181672
It is a .rar file so you will need to download a decompression sofware from 7zip.com.
4. Disconnect any USB connections connected to your unit (Ipod, USB drive). Power it up. When the pioneer logo comes up, press and hold the menu, map, eject and the reset button at the same time. Release the reset button first.
When you hear a pop sound from your speakers, let go of the eject button but continue to hold menu and map buttons. This will bring you to a blue screen where you will have to enter the service combination. Press the volume knob in this sequence and you will see * signs for each push: Up, Up, Down, Menu, Left, Right.
5. Once there, go to the option that says Update WinCE. It is actually WINCE update .
Be careful with not to press the knob while trying to move up and down, or you might press the wrong choice by accident.
6. Insert into the unit the SD card that has WINCEIMG.bin and WINCEIMG.cks on it (STEP 2)
7. Select Update using SD/USB (format) option. This will format your FlashDisk removing any corrupted files on there that prevent the unit from loading.
8. Wait for the update to finish. When the prompt says to restart your unit, take out the SD, put in the testmode SD card and restart. Press the reset button.
9. If testmode starts normally, you see the windows screen and it does not reboot in couple of seconds, ignore this step. If not, download the latest update from Pioneer, put it on the SD card that contained WINCEIMG.bin and WINCEIMG.cks (format it first) and perform an update. Testmode should be working once this is done.
10. When in windows, plug in the USB drive with the backup you downloaded in Step 1.
This step can be accomplished with either an SD card or a USB drive. Once you are in testmode, you do not need the flashcard to remain in the headunit. Although I did use a USB drive and plugged it into the cable that goes to my Ipod, I could have easily placed the files onto an SD card and inserted the card into the headunit..
11. Go to start, control panel, Storage.
Due to the difficulty of the next few steps, I would take the few extra seconds required to calibrate your screen. When I was doing my reflash, I got to a point where I needed to select something that was not selectable because the screen was so far out of calibration. Trust me here, do this step. Press Start,settings,control panel and then look for the stylus icon. Double click the stylus icon and click on the calibration tab and follow the simple calibation instructions. You will thank yourself for doing this step. Once this is complete, it is now time to clear the internal flash memory to get it ready to accept the new files. While still in the control panel double click on the Storage Manager icon.
12. Unmount FlashDisk, and press FORMAT.
Once the storage manager box is open, you will have a dropdown box with 3 or 4 selectable options to choose from. You want to make sure that this source is selected: dsk1: sdmlc disk and the partion on the right will read like this: part00
Press the button that says Dismount and then press the button that says Format. This will erase the internal flash memory and you will lose the partition. No problem. In the bottom right hand corner of the screen, there is a small icon for the virtual keyboard. Click on this, and a window will pop up that says keyboard. click on the keyboard font and it will launch the virtual keyboard. Now, in the right hand column of the storage manager, click the button that says New and you will create a new partition that will prompt you for a name. Touch your stylus in the name field and then type in part00 and press the OK button. You will now see that you re-created the original partition and it is already mounted. If you chose not to recalibrate your screen as suggested earlier, you can now begin to start swearing as the keyboard will most likely not be selectable.
13. Once formatted, create a new partition and call it part0. Mount it back up.
Just skip this step as you already completed it in the step above.
14. Copy ALL files from USB drive backup to FlashDisk This should take about 40 min or so
This is the step that had me tearing my hair out until I figured it out. You can now close the control panel and anything else that is open so that you go back to the desktop. Double-click on the My Device icon. Here you will see a few icons that represent your different storage devices. You are now going to copy the files from either your SD card or USB drive depending on which storage medium you chose in step 1. If you are using a USB device, make sure it is plugged in. If you chose to use an SD card, make sure you insert it into the headunit. As I chose to use a USB drive, my instruction will detail this step, although the exact same thing applies to the SD card.
Double click on the USB disk icon. This will show you all the files that you stored on the USB drive back in step 1. Click on the Edit tab at the top of the screen and then press Select all. Press on the Edit tab agian and then press Copy. Now, double-click on the My Flash Disk icon and it will open the folder that you formatted earlier. There may be a couple of very small files in this folder, but they will be over-written very soon. Click on the Edit tab and then press Paste. This will dump all the files from the USB drive into this folder. You may get prompted about " do you want to over-write some files". The answer is "Yes to all". It will now take about 45 minuted to download the files into the internal flash card. Once this is complete, follow the final step and you should be set. After rebooting/resetting, you will have to plug your Ipod in and reset all your personal preferences.
PS. If you chose to use an SD card to transfer the files, instead of double-clicking on the USB disk icon, double click on the Storage card and follow the same instructions.
15. Take out any SD cards from the unit and reboot.
Thats it! This should solve any problems!
By the time I figured all this out, I was so PI$$ED-OFF that I thought I would take the time to give my feedback here to help others who are suffering from the same issues. I sincerely thank the OP for his instructions as a starting point. This will be my first and last purchase of any product from Pioneer.
Carmen