I have most of the Minolta A mount bodies, I like the 7, right now shooting with the 9, still the body I like the most is the 800si. Has really good AF, lighter than the 9, I think a bit better build quality than the 7. I also like the 7xi and 9xi, I have a number of the dreaded cards that work ok, only issue is that can only use one card at a time, so if you have the travel card in use you cannot use the multispot card.
Will your 7 power up or just dead?