This will bring your device back to the unrooted 2.2.2 stock ROM. This has only been tested by the OP (me) on a T-Mobile 4G version. If you use this on other models, I cannot guarantee it's usefulness.
(Windows Only Instructions) If you’re a Linux user, you should be able to 'translate' this yourself.
This is for those who cannot use fastboot or adb. If you can successfully use these tools, DO NOT use NVFlash. You will lose all your data on your device. Do not proceed with these instructions if you are not expecting to lose all personal data on the device.
Step 1) APX Drivers – To work in NVFlash mode you need to install the drivers for the nvidia boot-recovery device. Power off your device and disconnect it from the computer. Hold down the Volume up & down buttons while plugging in the USB cable. (Or leave the USB cable attached and hold the pinhole ‘power off’, hold down the volume Up & Down and release the pinhole ‘power off’.) (The volume button seems like a rocker switch, but you can hold down both sides at once)
Your computer should now recognize the Streak 7 as an APX device. Manually install it using the nvidia boot-recovery drivers.
Nvidia Boot-Recovery Drivers
Step 2) Install NVFlash. For ease of function simply create a folder on your C:\ drive called ‘nvflash’. Download the nvflash zip and extract it to the nvflash folder.
Step 3) Download the 13 img files that make up the original partitions of the device. Files p2.img through p14.img. Put these files in the C:\nvflash folder. ***You can skip the 14.img file (Don't put it in the NVFlash folder) if you want to attempt to keep your original internal SD Card data, but again, no guarantees.
IMG File Mirrors:
(.zipx file containing P2 through P22 - 387 MB)
Original System File Mirrors:
(.zipx file containing Boot, System, Recovery and Animation - 125 MB)
Step 4) Launch (double-click) the Restore.bat file from the C:\nvflash folder. This batch command will begin copying the partitions to the device. Wait patiently as your device is being restored.
Step 5) Once all of the partitions have been written, use the pinhole ‘power off’ button next to the SD card to power off the device. Now power it back on normally to enjoy your restored Streak 7.
If you have trouble with any of the links or corrupted files, please pm me or reply to this thread.
That's all I can do folks. Ran out of free space on my free storage site.
*** Update *** If you are still stuck at boot logo, check to see if you can get into fastboot mode, if so,
finish restoring with the fastboot method.
************* Also, I recently used this method to restore from Honeycomb. I too was again stuck at the Dell logo. However, I was able to use the recovery menu (Vol Up + Power) and do a factory reset and was fine from there.
Original System Files
T-Mobile Boot Animation