From owner-freebsd-hackers Mon Jun 12 22:36:30 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id WAA10247 for hackers-outgoing; Mon, 12 Jun 1995 22:36:30 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id WAA10190 for ; Mon, 12 Jun 1995 22:36:25 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.11/8.6.9) id WAA05290; Mon, 12 Jun 1995 22:30:53 -0700 From: "Rodney W. Grimes" Message-Id: <199506130530.WAA05290@gndrsh.aac.dev.com> Subject: Re: Problem with 2940 SOLVED To: taob@gate.sinica.edu.tw (Brian Tao) Date: Mon, 12 Jun 1995 22:30:53 -0700 (PDT) Cc: evanc@synapse.net, hackers@freefall.cdrom.com In-Reply-To: from "Brian Tao" at Jun 13, 95 12:39:02 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 1554 Sender: hackers-owner@FreeBSD.org Precedence: bulk > > On Mon, 12 Jun 1995, Evan Champion wrote: > > > > Guess what the problem was. > > > > Dead SIMM. > > Sounds like a problem I had with one of my machines when I first > installed 2.0.5-ALPHA on it. It was a brand new motherboard, but I > was getting random crashes and kernel panics while installing. The > master partition editor screen had an extra '0' printed in one > character cell, while the colour dialog screens did not. I couldn't > figure out what was causing the problem, because an identical machine > sitting next to it breezed through the install. > > After I inspected the motherboard, I noticed the metal clips that > hold a SIMM in place were broken, and the SIMM (although held in > place) was wobbly. Exchanged the motherboard the next day and all the > problems disappeared. Bad contacts can cause weird stuff. Reminds me > of Apple's field maintenance suggestion for their Apple III's: life > the computer about a foot above a hard, flat surface, then drop. > Reseat chips as necessary. ;-) As a person who has been around the computer manufacturing business for most of my life working with every thing from silicon processes to final system testing I have found that over 80% of all computer eletronic failures can be traced to ``conection failure'' weither it be at the micron level inside a chip, or macro level from a cable left unplugged :-) :-) -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD