🚀 go-pugleaf

Simon Slavin <slavins@hearsay.demon.co.uk.NOJUNK> wrote:

> In article <B0C34504966824854@cara.demon.co.uk>,
> peter@cara.demon.co.uk (Peter Ceresole) wrote:
> 
> > Each time these type 11 errors have shown up, they have tended to persist
> > when I reboot. Type 11. Reset (Ctrl-Cmd-start) and some problem or other
> > crops up again-
> 
> Type 11 errors are usually down to (pause for to create tension ...)
> 
>                             loose RAM chips !
[snip]

So *that's* what `miscellaneous hardware exception error' means...

> If you're brave, open it up, take out the memory clean the contacts
> with a rubber, and put the chips back in all swapped around.

Someone like me would suggest using a squirt of pukka switch cleaner
(you can get it in aerosol cans from Maplin and possibly Tandy) on the
RAM SIMM contacts, (rubbed with a lint-free wipe for preference, cotton
bud if not), and something similar for the SIMM socket.  Make sure you
leave a thin film of lubricant when you've finished - I tend to squirt,
rub, and squirt again.  Just a squirt of switch cleaner without any
rubbing is worthwhile - it dissolves crud, which is then shifted out the
way when you re-fit the SIMM.  I use this stuff when I'm fitting *new*
ICs, SIMMS, and the like.  

The advantages of switch cleaner over using a rubber are many: it
doesn't remove any of the *very* thin gold plating you often get on SIMM
contacts; it doesn't leave any traces of rubber on any of the contacts;
it cleans the socket as well as the SIMM; and best of all, it leaves a
thin layer of oil over the contacts.  This film moves out of the way of
the electrical contacts, and forms a nice barrier against air-born
contamination - it keeps the air away from the metal, so it's difficult
for any gases that might want to oxidise or tarnish anything to actually
get in contact with anything that might want to be oxidised or
tarnished.  All in all, very good stuff.  It even works wonders on
variable resistors - I've turned an old audio amplifier, a 150MHz
dual-beam Textronix oscilloscope, and an old Roberts radio from
`unusable' to `lovely' just by squirting loads of the stuff into the
cases of the various variable resistors and working them back and forth.
All the excess noise you got moving the knobs vanished and they're both
great now.  (A fiver for the radio; the amplifier and 'scope were free.
Replaced the amp's 741s with TL071s and it's really rather excellent - a
Texan II for those who are into that sort of thing).

It can be worthwhile shoving bits of loo roll in corners that you think
might get hit with excess switch cleaner before you squirt away -
leaving patches of any oil over the PCB and circuitry of an oscillscope,
for example, is rarely a good idea.  Try and keep it on and around the
contacts.

[snip]

Rowland.

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