Welcome to the MacNN Forums.

If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

You are here: MacNN Forums > Enthusiast Zone > Classic Macs and Mac OS > Open Firmware boot problems

Open Firmware boot problems
Thread Tools
Professional Poster
Join Date: Jun 2000
Status: Offline
Reply With Quote
Jun 24, 2001, 12:31 AM
Hi all!

I've got a really big problem this time (at least I think I do). My iMac was sitting there with the gray screen (at startup), and was just stuck there (I must have restarted and left, and hadn't noticed that it didn't start up). Also, the hard drive wasn't spinning. So I tried the restart commands on the keyboad (forgot about control-command-power, grr). Anyway, they would restart the machine, but the hard drive wouldn't spin, and I didn't get any further than the gray screen. So, I bit my lip, and pulled the power cord. I put it back in, then pushed the power button. What a nice surprise for me when it started to boot, because it went right into Open Firmware (a scary place IMHO). It says boot failure, and that is because of an invalid checksum. I can type "shut-down", and that works. But when I type, "mac-boot", there is this smaller version of the Mac OS logo, then a flashing question mark. Not the typical flashing question mark that looks friendly, it's a smaller on that I've never seen before. Then underneath, there is this message:

I've tried booting from my original 8.6 CD, then the OS 9 CD, with no success. Nothing seems to work. I unplugged everything except for the keyboard and mouse (well, network cable is still in there. . .). I zapped the PRAM a few times, no success. Recently, I installed the TechTool Pro 3.03 update (err, the most recent one, I might have those numbers wrong). I've done everything I know of, and I'm stuck. I'm typing this on a PC, and *not* having fun doing it
Here is my computer:

iMac DV 400MHz
384MB RAM (128 + 256)
Mac OS 9.1

If more information is needed, just ask or email me. Thank you in advance for your help.
Clinically Insane
Join Date: Apr 2000
Status: Offline
Reply With Quote
Jun 24, 2001, 09:40 AM
Pull your network cable, pull your RAM. Keep only the original RAM in there, then do the following. If it doesn't work, do it with only the OTHER RAM.

Try booting.
If no go:

1. Remove all power for 2 minutes. Try booting.

If no go:

Repeat 1.
Reset the PRAM by hitting the CUDA switch or removing the PRAM battery. I have no idea where its located on your iMac but it will require some disassembly. Boot. Hold the option key down if it doesn't work the first time.

Could you get a picture, like a photo, of this strange System Icon? Does your computer make a strange sound at startup? These tones can give clues as to the problems. If they still do that nowadays, that is.

I'm thinking a corrupt ROM (that icon leads me to believe this, mostly).

Try this and report back.

[ 06-24-2001: Message edited by: Cipher13 ]
Professional Poster
Join Date: Jun 2000
Status: Offline
Reply With Quote
Jun 24, 2001, 10:25 AM
Well, what do ya know? I tried to boot it up this morning, and it acted like nothing had happened. Booted right up.
When the Finder loaded, though, there was a sound manager error, and it said that sounds had been disabled. The window isn't new to me, it's done that before. I simply restart has always fixed the problem.
Here is a
MacFixIt Forum Page that has a situation that is very similar to mine (different machine, etc., but the same problem and error messages).
Hopefully if it does this again, I can push that button and it might fix things. I believe I can access the button through the little door that lets me get at the RAM.
Sorry 'bout the photo. But if this problem comes back again, I'll use my camcorder to take a still for everyone.
Thanks for the help!
Thread Tools
Forum Links
Forum Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On
Privacy Policy
All times are GMT -4. The time now is 05:56 PM.
All contents of these forums © 1995-2015 MacNN. All rights reserved.
Branding + Design: www.gesamtbild.com
vBulletin v.3.8.8 © 2000-2015, Jelsoft Enterprises Ltd., Content Relevant URLs by vBSEO 3.3.2