i have a 2700 and 3900 that will not power on and also will not read jtag. i did a full erase on the 2700 it would read before i did the erase now no power and won't read jtag. a friend gave me the 390 it will not power on or read jtag. is there a diagram for me to trace power or do some sort of trace cut or anything i can do to get a jtag read or get the receiver to power on i am willing to try anything that might work. i just would like to get some good advice on things to try . thanks for any and all help i am sure that someone might be able to help