JohnBeardmore wrote: ↑
Sat Jan 05, 2019 11:53 pm
So why have "some pi3B+ have suffered sudden failures in this way" ?
No one knows. RPT are investigating this and other issues relating to the PMIC with MaxLinear, the manufacturer of the chip.
Burngate wrote: ↑
Sun Jan 06, 2019 11:41 am
Someone - Hippy? - was collecting annecdotal information from posts on the forum.
More noting them in passing. Multiple reports of 'unexplained failures', often on the same day, raised some internal mental flag, and later I set about quantifying the issue.
Milica wrote: ↑
Sun Jan 06, 2019 12:42 pm
there appear to be many other people going through the same thing.
Not that many. I have noted about 50 posts of 'unexplained failures'. That's a very small number compared to how many 3B+ have been sold.
I only recorded those where it was certain the user had a 3B+, were adamant they had not shorted anything out, where it appeared they had not done anything wrong, and the Pi had booted successfully then failed.
I may have missed some, even discounted some I shouldn't have, but I doubt it would alter the numbers significantly. There may be some I shouldn't have recorded because I never tracked the threads.
Looking at those I recorded; reports of 'unexplained failure' increased from June and peaked in August last year, which may or may not be significant - 2 in Mar 2018, 3 Apr, 2 May, 7 Jun, 9 Jul, 14 Aug, 3 Sep, 2 Oct, 4 Nov, 1 Dec, 2 Jan 2019.
If I were to have recorded those where the PMIC failed after a short it would probably double the number. That's based on the posts I recall discounting as 'not unexplained', where it wasn't clear the user had a 3B+, or where a short had been admitted to or was suspected.
But, doubling to 100 would still be a small number - 0.01%, one in 10,000, if a million sold, and it's probably more than that.