2 Chemical smell... power supply?
Hello, I started noticing a strong chemical smell coming from the bottom left air-vents of the Thunderbolt Display, but no other signs. The brightness is fine, it powers the MacBook, and no strange behavior. I ordered a PSU replacement, did I make the right choice? Should I also replace the FAN? (but I’m finding only used fans…)
Update (02/18/2021)
@danj Thanks Dan, mine is different. Look at the photo, I marked what seems to originate the bad smell. Is still the component you mentioned before?
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973 
Without opening it up to inspect things it could be anything!
由 Dan 完成的
Hello Dan thanks, yes it could off course... but I didn't want to open it without first having something to swap, as I have fear for that delicate wires that need to be disconnected to separate the two monitor parts. I wanted to know if, based on experience, this smell could indicate a faulty PSU, as the fan itself shouldn't make burning smell (am I right?), and it pushes air through the PSU pub and then it gets out on the left air vent at the bottom
由 Vanx 完成的
I've replaced more logic boards than PS on these monitors. A fan would not be the first thing I would suspect.
由 Dan 完成的
Thanks, so I need to open it and check every power rail I suppose? At this time not other sign of malfunctioning (unfortunately). I could keep in using it, but the only thing is I have fear the smell could be toxic.. what did you find on defective logic boards?
由 Vanx 完成的
Burnt caps mostly
由 Dan 完成的
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