Subj : USB lock up - poo!
To   : Ky Moffet
From : Barry Martin
Date : Fri Oct 23 2020 09:22:00


Hi Ky!

 >   KM> Basically when there's an electrical fault, EVERYTHING stops, so
 >   KM> no writing anything anywhere. If a file was in progress at the
 >   KM> time, it'll likely POOF unless the utility writing it keeps
 >   KM> incremental versions.
 > So what is occurring is essentially normal for that kind of fault.
 KM> Yeah... I wouldn't expect the logfile to be written.

OK, so seems a Southbridge problem is being confirmed.


 > Actually that information helps in a slightly convoluted way.  Without
 > detailed testing it appears the problem is with the Southbridge, and the
 > only way to fix that is replace capacitors which in theory I can do,
 KM> Assuming it's the caps, but yeah, and the real fault, at least
 KM> per what I found re mine, is a design flaw in the Southbridge
 KM> circuit that cooks the capacitors. So replacing 'em would work
 KM> for a while, but eventually they'd fail again.
 
And probably can't replace with larger values as wouldn't physiclly fit.
Using ribbon cable to run to a 'capacitor card' would take care of the 
size problem but probably cause a timing issue.  


 > just getting in there to solder in teeny-tiny quarters might be an
 > issue.  Plus we have a motherboard/CPU combination I'm finding not quite
 > to my overall satisfaction.
 KM> Well, mine got repurposed to what it CAN do... was sad to retire
 KM> it from everyday use but I kinda needed the whole thing to work!

Yes: "perfectly good except for".  LIS I can't think of a non-critical 
usage here which still takes advantage of the multi-core/higher speed 
CPU.  Maybe NAS? I'm a bit concerned about the Southbridge-controlled 
read/write to hard drives.


 KM> Hopefully the New! Improved!! PCs will do the job better for a
 KM> long time...
 
Hopefully!  ...Did see a MSI motherboard being offered the other day on 
a Shell Shocker special -- I did perk up but right now too many other 
projects going on to check out its details, especially which (Intel) CPU 
to get.  Quite sure more will be available .


 
                         ¯    BarryMartin3@    ®
                         ¯   @MyMetronet.NET   ®

.... Rather than beep
 Or rude error message,
These words:"File not found."
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