Did you copy the 'CONTENTS' of MyFlash drive over rather than copying the MyFlash drive folder?? Or just do the FX3.1 upgrade.
Here's what I found somewhere else that worked for me finally, you cant just copy the contents from the card over and paste to the unit!!!! PM me w/ any questions.
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.
damn i did every step 1 to 15 on my f90bt and now after step 15 take out any sd and restart, when i turn it on it shows the splash screen and then just turns off back to black screen before i did any of these steps at least i still went to the main menu for a couple of seconds, now just the splash screen and off, can anybody help me!!!! i did every step 1 to 15 exactly as its written no problems at all through the steps, now when i finally thought i was done and had my unit fixed, just splash screen and off, do i need to go back into testmode, windce screen, and add a diffrent backup files to flash disc!! what do i do please help!!