Doesn't boot when connect second HDD

[sachchundan]

My secondary HDD was working smoothly.but one day power gone after that I turn on but its didn't work. After I removed a second HDD and turn on. Its worked
When I connect the second HDD cannot boot cannot F1 F2 ,also
Please help me

 

[scout_03]

this look like it is out do you have a external case to plug it in system as usb device and if system cut this one is out of service .

 

[seagate_surfer]

sachchundan, try connecting that drive to another computer to see if if is detected. Did you have a back up in place?