Post
Topic
Board Hardware
Re: Hacking a BFL Jalapeno to 28GH and beyond....
by
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on 09/01/2014, 06:30:46 UTC
On another side note I finished reviewing a blown board that was given to me which had a complete blow-out of the 1 volt FETs due to a short.

Micro-summary: It's destroyed. Not because of the FETs; I got those off easily and cleared the shorted 1 volt lines. It's the fact that the whole 3.3 volt line is shorted as well; I was trying to figure out where that went bad and found out there was a nice bubble in the board by the chips. Apparently the 1 volt line not only shorted but it burned inside the board, shorting the 3 volt supply to ground.

Not good :-) So if you blow the FETs, repairs would require board-level digging, not something I would do for a $200 part. I may fiddle with it some more, but for the moment I will classify this as "toast". :-)

C

To be honest I contribute a lot of that to the tightly packed nature of the board. If anything blows it has a high chance of taking something else close-by with it.
glad I didn't try and fix my 3.3v shorted one.