I bricked a magellan maestro 3140

3140, tried to use a map update I was given. I believe I deleted the endite drive, now I can only boot to the whit screen and if I hold reset and start, I get the setup screen, have tried with no sucess to reflash . I thought it was similar to an eprom, but my own screw up caused the problem, I should have stopped whil I still had the blue screen, will appreciate if anyone can help, don't mind paying someone if they nail it. As a trader my word is usually enogh for most.