View source for Raspberry Pi PWR LED illuminates, but doesn't turn on or faint buzzing when connected to power Repair

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{{Repair Guide
|Device=Raspberry Pi
|Affects parts=
|Needs equipment=
|Type=
|Difficulty=
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==Problem description==
PWR LED illuminates but doesn't turn on or faint buzzing when connected to power supply. Missing voltages at a GPIO pin.

* Pi '''3''' (A+ and B+)
* Pi '''4''' (all)

[[File:Placeholder image.jpg|thumb|Example image (Figure 1) -- No image yet. Help expand this page by uploading it!]]
==Symptoms==

* The red '''PWR LED illuminates, but the system doesn't turn on.'''
* There is a '''faint buzzing sound''' when power is supplied to the PCB.
* 5V present at GPIO 2, but no 3.3V on GPIO 1.

==Solution==
See [[Raspberry Pi MXL7704]]

===Diagnostic Steps===


===Repair Steps===