A PCB board with blue copper corrosion on a copper trace that is normally protected by solder mask. The battery leakage got underneath the solder mask and destroyed the traces.

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   48kRAM (48kram@oldbytes.space)'s status on Tuesday, 20-Sep-2022 22:45:15 JST 48kRAM

   I can't move to the Fediverse properly until I reproduce my famous pinned post from the birdsite, so here it is:

   P.S.A. To all vintage computer and video game collectors:

   Go through your collections and GET THE DAMN BATTERIES OUT!

   Now! Don't wait! Seriously, put down the phone, go to your collection and take out all the batteries. Right now! Even if they look "okay" they are NOT SAFE after this much time.