So, are you officially validating the use of percussive maintenance? On Fri, Aug 11, 2017 at 2:59 PM Herb Johnson via vcf-midatlantic < vcf-midatlantic@lists.vintagecomputerfederation.org> wrote:

Degnan: I am picking up a MAC SE model 5011 with a bad SCSi HD (I am told) on the way to the workshop Saturday to play around with. Not sure if anyone is into these I think the hard drive is bad...

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It bugs me sometimes, that many of my VCFians don't realize I've been fixing and selling classic Macs and parts for about 20 years.

http://www.retrotechnology.com/herbs_stuff/mac.html

Old hard-drives fail for the factual reasons cited. Smacking hard drives to release them from what most call "stiction", works in various ways, depending on the actual physical fault, which isn't always "stiction".

On compact Macs, there's bad connections which a smack on the case will verify and sometimes "fix". Just as in an earlier post, I suggested removing IC chips from sockets, fixes (or causes) bad connections.

As for stickers on Macs. I don't engage in voodoo discussions, but sometimes voodoo methods have a basis in fact. A properly placed smack! is an exercise in physics; a properly placed decal is an exercise in art, or voodoo.

Bill Degnan is an old friend of mine, but sometimes I think he "smacks" the VCFed NJ list, just to see if it "fixes" the discussion, or just to watch the sparks fly. Three times is the charm, Bill. Or...three strikes and 'yer OUT! ;)

Herb "wack-a-mole" Johnson

-- Herbert R. Johnson, New Jersey in the USA http://www.retrotechnology.com OR .net preserve, recover, restore 1970's computing email: hjohnson AT retrotechnology DOT com or try later herbjohnson AT retrotechnology DOT info