> Date: Tue, 14 Jan 2003 00:45:13 -0800 > Subject: Re: Quadra 840AV???? > From: James S Jones > In-Reply-To: > Message-Id: <[EMAIL PROTECTED]> > > Itchy send finger syndrome strikes again. > > Since you're not getting a start up chime, but were when you found this > machine, I'd say your problems are in one (or more) of five areas: RAM, > VRAM, NuBus cards, the monitor you have attached to your 840, or the > logic board settings. > > You can use any 72-pin SIMMs, EDO or FPM, from 8 to 32 MB, provided > they are 60 ns or faster and are CAS-before-RAS. As with all slots on > the Q840 logic board, it is not a simple matter to get the RAM seated > properly. > > There is 1 MB of VRAM soldered to the logic board. You can add 4 256 KB > VRAM SIMMs, 80 ns or faster, for a total of 2 MB. When you added VRAM > SIMMs, they were the correct ones for your 840, yes? And, when you > removed them, you pulled all four? > > You've never mentioned having any NuBus cards (including things like > the various Video Spigots). You don't have any connected, do you? > > Although the Q840 is supposed to support all Apple monitors, I'm not so > sure about 14-inch RGBs. I'd say a properly adapted VGA monitor is a > better bet. You may want to try leaving the monitor powered off when > you power up your 840 and see if you get a chime, that way. If so, wait > 20 or 30 seconds and then turn on the monitor. > I am definitely going to give this a try.
> > Lastly, you said that you'd reset the logic board by leaving it without > PRAM battery for at least 10 minutes and then put in a known good > battery delivering 3.2 or more volts. Did you do this before or after > your last change to the RAM/VRAM configuration? > Since there was no VRAM at all installed in the machine originally, I removed it after the problem started. I originally thought this might have been what was causing the problem. Since then I've left it out because I figure it's just one more variable. These are 256mb Apple VRAM. I have tried numerous combinations of RAM since the battery change. Right now I am working with just one of the chips that were in the machine when it worked. I am not experiencing any problems installing the RAM. They go in quite easily, and are evenly and solidly seated when I check them. > If before, reset it > again, then start up with the monitor off and listen for a chime. If no > chime, try one more time with the monitor on. > Thank you! This is something I haven't tried yet. Nancy -- Quadlist is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Quadlist info: <http://lowendmac.com/lists/quadlist.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/quadlist%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
