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- Path: sparky!uunet!portal!cup.portal.com!Bob_BobR_Retelle
- From: Bob_BobR_Retelle@cup.portal.com
- Newsgroups: comp.sys.atari.st
- Subject: Computer reliability
- Message-ID: <74370@cup.portal.com>
- Date: Mon, 25 Jan 93 19:22:46 PST
- Organization: The Portal System (TM)
- References: <11778@uqcspe.cs.uq.oz.au> <9301217343@ritz.mordor.com>
- <1993Jan25.052439.8917@erenj.com>
- Lines: 24
-
- Marcelino Bernardo makes a good point about semiconductor reliability
- versus mechanical reliability...
-
- Oxidation can occur even with the best gold plated connectors,
- and when you're dealing with multi-megahertz clock speeds even
- the slightest added capacitance can throw things off.. the added
- resistance of a bad connection can also play havoc with signal
- levels, especially with older logic which doesn't have radical
- voltage swings between logic levels.
-
- Many times "fixing" the mainframes where I work will be as simple
- as removing and reseating a circuit board.. just wiping the
- oxidation from the fingers is enough to get it working again.
-
- So while Warwick had it completely backwards in regard to the
- reliability of the semiconductor electronics in a computer, he
- was right about the mechanical reliability.
-
- (The top of my 520 ST's case hasn't had the screws in it for
- longer than I can remember. Whenever there's a problem, the
- first "fix" I try is opening the top and pushing all the chips
- back down.. nine times out of ten, that's all it needs)
-
- BobR
-