Question Discharge under HDD, seems to be coming from the PCB ?

Nov 28, 2020
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Hello,

While taking the HDD out of my laptop for an SSD upgrade, I noticed there is a green liquid on the thin black foil part that covers it. I've attached some photos.

The HDD was still working perfectly before this. I cleaned the black foil with a wet q-tip and put the SSD in (after it was dry, of course).

Now I want to put the HDD into the optical drive bay (I have a caddy).

So my questions are: What were those stains? Are they dangerous? Should I clean the PCB on the HDD as well (with isopropyl alcohol or something)?

The HDD is a Western Digital WD5000LPCX, about 2 years old.


More photos here
 

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