hello, last week, i made a mistake while wiring my printer with a new rumba. now 1 of the 2 12v rails is dead. i can messure some volts but there is no current flowing. so i though "just a buy a new one" so i did. now they have sended me a rambo. not a rumba... my first impression of a rambo: "so many variants, so little documentation" i liked the rumba because of some upgrades i could do on myby mknaap - Controllers
did you mod the sanguinololu board? i had the same problem. solder some wires to the back to fix this bug http://reprap.org/wiki/Sanguinololu#Bugs /marcoby mknaap - Reprappers