Problem Stack Switch N3000

Dear, I have the following problem, I have a stack of 3 switches dell N3048 (6.0.1.3), in which the master switch does not answer the command line, I cannot do anything, but if I connect the serial cable to the other two stack switch, they tell me to connect it to the master (the one with the problem), it should be noted that the fault switch the problem is only from the administration, since the team has not lost connectivity. Therefore I have the following questions:

• I understand that the only way to recover the switch is to restart it, but can I restart a swich from the stack? or would I have to reset all 3 switches?
• If I reset a switch in the stack, does the stack become disordered ?, or do they keep the same assigned numbers?
• They know another alternative ...

I remain attentive to your comments or guidance.

Slds

PD: Sorry my English, it's from a google translator