Replacing a Raspberry Pi connected to HiFi-Berry

To begin the process, power off the cell. Most HiFiBerry models are secured using four white plastic screws. Unscrew these and lift the board off the GPIO pins, taking care not to bend or damage the pins during removal. This step is important because the HiFiBerry board sits directly on top of the Raspberry Pi and must be removed before you can access the Raspberry Pi itself.
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Once the HiFiBerry is removed, you can proceed to remove the Raspberry Pi from its mounting. Locate the four metal screws that secure the Raspberry Pi to the breakout board. Unscrew these with your fingers. After the screws are out, disconnect all connected cables such as power, HDMI, Ethernet, and any USB devices. Make sure nothing is still attached to the Raspberry Pi before proceeding to the next step.
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Now, insert the new Raspberry Pi into the same position where the previous one was mounted. Align it with the mounting holes, and then secure it with the same four metal screws you removed earlier. Once the new Raspberry Pi is firmly in place, gently reconnect the HiFiBerry board by pressing it down onto the GPIO pins. Be sure the alignment is correct and that all pins connect properly. Finally, reattach the four white plastic screws to secure the HiFiBerry in place.
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Once everything is assembled, reconnect all the cables to the new Raspberry Pi and power the cell on. Check to make sure the system boots properly and the HiFi-Berry board is working as expected.