Phillip, Most of your post is correct, but the main reason for having the machine plugged in AND OFF is that the CRT is brought down to earth ground potential, which is the most safe for us humans.
> Date: Sun, 01 Sep 2002 13:36:47 -0600 > From: Philip Stortz <[EMAIL PROTECTED]> > Subject: Re: CRT Discharge Tool? > > actually, no. the voltage will not discharge through the ground > terminal on the power cord, it will discharge between the chassis > (because it is connected to the outside, conductive coating of the crt > which forms the "ground" plate of the capacitor) and the internal layer, > or "dag" of the crt which is the "hot" terminal of the capacitor. For Dan, The checkerboard display is a symptom of a poor connection at the boot ROM or a bad boot ROM altogether. I've got a couple SE/30's, and they've both done this from time to time. One ROM boards' edge traces were eaten thru by the connector. I suspect the fans' vibration is the root cause here. For a temp fix, I carefully laid solder on each and every pad. I eventually found Old Mac Milt, who sold me a used part for a good price. On another machine, it was just a simple matter of cleaning stray hair/debris away from the connector area, and cleaning the edge traces with a CLEAN pencil eraser. Mac Man Mark Macintosh Computer On-site Service [EMAIL PROTECTED] -- (Double Play Band, too) -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> The FAQ: <http://macfaq.org/> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
