Console access is not available on CON port of qfx5100-24Q

Hi Experts,

There are two qfx5100-24Q leaf switch and the current configuration is below in my lab.

I can access to one of switch via CON port directly. This is fine. 

But the other switch is not possible even via CON direct access by using console cable (The same calbe used with above one).

What can be possible reasons of this issue? Due to this access issue it is not possible to fetch internal log nor core dump from the system.

virtual-chassis {
preprovisioned;
no-split-detection;
member 0 {
role routing-engine;
serial-number XXXXX;
}
member 1 {
role routing-engine;
serial-number YYYYY;
}
}

Serial port configuration on my PC is exactly configured with the following.

I am quite sure that my PC configuration isn't problem because I can access to one of switch via console without any problem.

• Baud Rate—9600
• Flow Control—None
• Data—8
• Parity—None
• Stop Bits—1
• DCD State—Disregard