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On a Vostro 3700 you must copy the .hdr file and rename it to winery70.hdr. Otherwise, the instructions above are spot-on! Thanks!
I'm having the same problem.
Vostro 3700 failed to flash with 3700_A12
I'm using a 1GB USB-Stick, FAT32
Files on Stick: 3700_a10.hdr copied to winery70.hdr and 3700_a10.rom
By holding the "End"-Button and putting in the powercable, the fan howls but nothing happens.
August 2017 and you're still helping people!
I went to flash the A12 BIOS on a friend's Vostro 3500 running a fresh install of Windows 10 1703 and during the update, screen went blank and it never came back on. After five(5) calls to five (5) different Dell tech support "dummy's" located in India ending all with the same recommendation "replace motherboard. Cost 350 $ CND" I went on the WEB, located your solution. Formatted a 8GB flash drive as FAT 32, extracted the winery70.hdr to the drive and plugged it in holding the end key. Came right up and flashed! Next thing you know it's back into Windows 10 all happy again!
Thank you from Canada
You have two options:
Locate a shop that can remove the BIOS chip, flash it externally and resolder it, or
Replace the mainboard.
You likely mean a ROM or an HDR file - if you search, there are ways to extract these from the BIOS exe file, but it is system-dependent AND your system must have failed in such a way that it will still at least try to boot the system. Some recovery modes will work from USB flash drives; others require a floppy diskette.
The chances this will not work are far higher than that it will -- the vast majority of failed flashes can only be solved by externally flashing the BIOS chip and then resoldering it on the board.
It's unlikely anyone at Dell will know - they simply replace boards when the flash fails.
Try here for a utility that's supposed to determine what the file should be named.
Here is how to recover from a failed BIOS flash update of a Vostro 3500 laptop...
1. Download the Dell BIOS update .exe file to a USB flash drive.
2. Run the .exe file with /writehdrfile parameter
3. Run the .exe file with /writeromfile parameter
4. Copy the .hdr file to winery50.hdr
5. Remove the battery and AC power from the dead computer
6. Insert the flash drive into the dead computer's USB port
7. Hold down the End key and then connect the AC power
8. Dead computer reads USB flash and asks if update should be done
9. Allow the update to finish and then reboot.
10. Computer is now working normally.
Helpful web site: http://mickitblog.blogspot.com/2011/09/dell-bios-switches.html
I have the same problem. I have a small question, did you re-flash the A12 BIOS to cure the problem or revert back to A10?
I had a problem with my SD card reader. So I updated to the new BIOS version A12. When the system rebooted it would not load windows.
If I remove the battery and unplug the power and then switch on. Press F2 and enter BIOS setup. I can then Save & Exit BIOS and it then restarts into windows. I need to have this problem fixed.
Should I use the A10 or A12 BIOS?
I have tried these instructions with no success. Do the files need to be in a subdirectory? Did you recover with A10 or A12? Since this seems to be a known issue Dell should either take the A12 down and fix it and replace the motherboards it has corrupted.