Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device.

My nRF52840-DK stopped working. When trying to connect using nRF Programmer v2.2.0 I get the following in the log:

15:45:05.011 Using @nordicsemiconductor/nrf-device-lib-js version: 0.4.1
15:45:05.012 Using nrf-device-lib version: 0.9.8
15:45:05.012 Using nrfjprog dll version: 10.15.1
15:45:05.012 Using JLink version: 7.60e
15:45:05.448 Application data folder: /Users/dev/Library/Application Support/nrfconnect/pc-nrfconnect-programmer
15:45:16.671 Unsupported device. The detected device could not be recognized as neither JLink device nor Nordic USB device.
15:45:16.671Please make sure J-Link Software is installed. See https://github.com/NordicSemiconductor/pc-nrfconnect-launcher/#macos-and-linux

I have tried to connect also with JFlash but I get this:

Application log started
 - J-Flash V7.60e (J-Flash compiled Jan 20 2022 11:11:07)
 - JLinkARM.dll V7.60e (DLL compiled Jan 20 2022 11:10:57)
Reading flash device list [/Applications/SEGGER/JLink_V760e/JFlash.app/Contents/MacOS/../../../ETC/JFlash/Flash.csv] ...
 - List of flash devices read successfully (451 Devices)
Reading MCU device list ...
 - List of MCU devices read successfully (8886 Devices)
Creating new project ...
 - New project created successfully
Connecting ...
 - Connecting via USB to probe/ programmer device 0
 - Probe/ Programmer firmware: J-Link OB-SAM3U128-V2-NordicSemi compiled Dec  3 2021 15:41:28
 - Device "NRF52840_XXAA" selected.
 - Target interface speed: 1000 kHz (Fixed)
 - VTarget = 3.300V
 - InitTarget() start
 - InitTarget() end
 - TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
 - InitTarget() start
 - InitTarget() end
 - TotalIRLen = ?, IRPrint = 0x..000000000000000000000000
 - Executing init sequence ...
  - ERROR: Could not perform target reset
 - ERROR: Failed to connect.
Could not perform custom init sequence.

Is the chip dead? How can I verify it?

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