Title says it all.
You mean start smoking, drinking, hanging around loose women ? Yes.
Cheap and easy to replace.
LTG : )™
Yeah...you're talking about 7-9 cents here. Even if you suspected it, you might as well just plug the soldering iron in and replace it. Then you'll know for sure.
No - they will either work or do not. That being said it can have a bad solder connection if it sometimes works or doesn't.
Yes, I've replaced flaky diodes that act up when they warm up.
Sometimes you can tug on completely good looking, good testing ones, and they just crumble in your grip.
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