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 @67db1784 4V is absolute maximum... so I'd expect some leeway on that. I wouldn't expect it to cause a short generally.

https://mastodon.radio/system/media_attachments/files/111/068/170/049/341/331/original/80cc1870b45eb4b3.png 
 @d4b81373 Thanks, that's very useful. Next step will be to remove the chip and replace it, 100 pins, how hard can it be! 
 @67db1784 That's easy. 
 @d4b81373 I'm thinking Kapton tape to protect the other components, hot air to remove the chip then drag soldering to put the new one in. 
 @67db1784 I never bother with the kapton tape but I'm quick and I've had a lot of practice - in general it's a good idea. 

Drag soldering is the easiest way of doing it if you don't have a fine tip, an excellent soldering iron, steady hands and a good microscope. 
 @d4b81373 At least I've got the first two of that list. 
 @67db1784 I have three out of four and an extreme lack of patience.