HP 49g - Stuck in No System menu

[sad_hp]

So, I found my 49g a few weeks ago and put new batteries in it and it promptly brought me to the no system menu. I have tried most of the documented reset button combinations with no success. I found my last computer in the house with a serial port and was hoping to connect and upload the flash is onto the calculator, but the connection software wasn't able to connect. Tried HP Comm as well as a simpler comm program from this site.

I know there isn't a lot of love for the 49g, but I was wondering if anyone had any suggestions?