Unable to program NRF52833DK

[Prof. Dipti]

I've nrf52833dk board, I'm doing i2c exercise from Dev Academy's NRF connect sdk fundamental course.
For some reason I used 'Quick Start' option in "nrf connect for Desktop" software and since then I'm unable to load program into the nrf52833dk board.

1. Whenever I'm connecting the nrf52833dk board to pc via usb cable, I'm not seeing the name of my board in PC's Device Manager and hence NOT seeing the name under 'CONNECETD DEVICES' option in VS Code nrf connect SDK.
Also,
2. NONE of the onboard LEDs are glowing when I power-up the nrf52833dk board ( i.e. when I connect the nrf52833dk board to PC via usb cable) BUT I'm getting Vdd = 3V and the 5v pin is also correctly showing 5V on multi-meter. 
3. I tested the usb cable and It's all fine, PC usb port is also fine. 
4. I pressed and hold the IF BOOT/RESET button (SW5) and then while holding plugged the usb back in, kept button pressed for 5-10 sec i.e. Tried to Force the interface MCU into bootloader mode, BUT NOTHING CHANGED. The Dvice Manager showed nothing.
 

[Susheel Nuguru]

Can you please try below from the command line from the folder where your nrfjprog is installed.

nrfjprog --recover -f nrf52

That should bring it out of any read locks if any. Try it a few times on failure. and if that does not work, then your chip is most likely bricked.

[Prof. Dipti]

Dear Mr. Susheel,

I tried many times. BUT it's giving the same output as shown below:-

C:\Program Files\Nordic Semiconductor\nrf-command-line-tools\bin>nrfjprog --recover -f nrf52
ERROR: No debuggers were discovered.
NOTE: For additional output, try running again with logging enabled (--log).
NOTE: Any generated log error messages will be displayed.

The 1st and most important thing is, my nrf52833DK board isn't visible in Device Manager. So how'd the command you mentioned "nrfjprog --recover -f nrf52" will work???

IS THERE ANY ALTERNATE WAY TO FIGURE-OUT THE ISSUE??
PLEASE LET ME KNOW.

Thank You.