Nrf51Dk not detecting

[Dhaval Dalvadi]

I have used nrf51Dk with nrfPPK before some days
now trying to flash nrf51DK but its not detecting any board
I tried to recover but not recovering it
I have already added jumper on p22 too.

LED5 is on and not blinking

[Susheel Nuguru]

Hi Dhaval,

After removing the PPK from nRF51DK, if the kit is still not responding to nrfjprog on the command line in any way, then there is a large probability that your kit is being shorted or you could have programmed it with something that makes it go to deep sleep too early (without a wakeup source) , hence bricked

[Dhaval Dalvadi]

When I execute this
nrfjprog --recover -f nRF51

LEd 5 starts blinking but recovering not getting complete

only getting this output
Recovering device. This operation might take 30s.

[Susheel Nuguru]

When your device is dead or bricked, then the nrfjprog would NOT be able to make any communication to your device using the debug port. When this happens, nrfjprog throws a different error. 

I would recommend you to uninstall your segger jlink drivers and re-install the latest ones since it seems the problem is inside the CDC communication of segger driver to your device. It DOES NOT SEEM that your device is dead/bricked yet.