Thank you, however as I mentioned in my original post, I have already tried to recover from all the other versions I could find and only A13 begins the recovery process, but it does not complete I am therefore stuck without either the A02 BIOS to try or suggestions/instructions of an alternative recovery process
Yes, it should work, I'm also about 100% sure, but there may be one more little problem - the BIOS may be fully destroyed and then there is nothing to fix. Here is a very similar problem and good enough teaching of what was done and how it was done. https://forums.mydigitallife.net/threads/dell-m3800-bios-recovery.77002/
Maybe try different USBs with different format (FAT32/FAT) before using different BIOS versions to recover. Just in case, OP should probably backup the original flash rom using CH341A programmer.
Yes, only the latest version launches the recovery though Yes that sounds like exactly the same problem, and I followed the same steps to reach the point I am at now Given that I can get the recovery started using the latest version I don’t think it’s the stick is there a site you can link with instructions on using a CH3414A programmer? thanks