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When some chip on my PCB makes a noise as GEE GEE ...

I identify it by using plastic straw.

for reference :

Why does acoustic noise occur in ceramic capacitors?

Examples of Noise Countermeasures

Step 1:

Insert this side into my earhole.

Step 2:

Touch every chips by another side of straw.

Then I can identify the crying chip.

<p>And what do you tell the chip? &quot;Shut up!&quot;?</p>
<p>Replace it since it is mechanically loose which means normally &quot;broken due to thermal stresses while soldering&quot;</p>
<p>Ah, ok :-) </p>

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