3 Replies Latest reply: Jul 31, 2007 9:05 AM by soccernamlak
soccernamlak Level 1 Level 1 (10 points)
Hey everyone.

Got the following for $5 at a Church Yard Sale:

iMac 350Mhz
Slot Loading CD
128mb RAM
Bondi Color
No Firewire
Airport Card which went straight to my PowerMac G4

The HD was a 6GB with Mac OS X 9.2

When turning it on, it made the normal Apple chime and you could hear the CRT turn on (that static sound or whatnot). The Power light was green.

The screen stayed dark though (not on and black, but off). However, after letting it load for a while, I pushed the power button, which caused the computer to go into hibernation. When waking it back up, the screen turned on and showed the OS (which happened to be messed up)

After swapping out hard drives with my working G4 (Mac OS X 10.3.9), I tried it again.

Again, same problem. Turn on, power button green, one single Apple intro chime, CRT sounds like its turning on, but isn't.

After going into hibernation and waking it back up, the monitor turns on.

Any ideas on what the problem could be?

In addition, the monitor is extremely off color and dim, even after adjusting brightness to the max and calibrating the colors. I've seen three solutions so far by searching, one by replacing the logic board, one by resetting the PRAM, and one by updating firmware. Is there any that would work for this problem the majority of the time? Or should I try the latter two and just take my loss if it's a going CRT and/or logic board?

Thanks for all your help guys and gals.

- KB

MacBook 1.83, PowerMac G4 400 AGP, Mac OS X (10.4.10), HP zv5160 P4 2.8GHz, iMac 350Mhz Bondi
  • 1. Re: iMac Dim Screen and No Screen on Boot Up
    spudnuty Level 5 Level 5 (5,250 points)
    Hey KB,
    Excellent diagnosis and description of problem, especially the high voltage coming on.
    When you say:
    "When waking it back up, the screen turned on and showed the OS (which happened to be messed up)"
    What do you mean by "messed up"?
    First any way you can boot it up check the firmware it should be 4.1.9. It could be 3.0 and be caught in the "firmware trap". The dark display and messed up color are classic.
    See here:
    http://www.avnr55.dsl.pipex.com/dotcom/panthereatsimac/problemsolver/
    You could find a 400 logic board and upgrade the iMac easily. You'd gain speed and FireWire.
    Richard
  • 2. Re: iMac Dim Screen and No Screen on Boot Up
    soccernamlak Level 1 Level 1 (10 points)
    Oh, ha, by OS being messed up, the owner who had the computer before had some server software on it, so instead of showing the Apple menu and icons, it was just a white bar at top with a background plus an error that said "couldn't find server" with options of manually finding it, automatically finding it, or shutting the computer down.

    I figure a nice fresh copy of OS X or 9.2 will do the trick for that

    For firmware, let me check it. I've got a few things to do, so i'll be back

    Thanks Richard for your help!
  • 3. Re: iMac Dim Screen and No Screen on Boot Up
    soccernamlak Level 1 Level 1 (10 points)
    Okay, ROM 3.1.2f2

    Guess I'm in the ol' 3.0 firmware trap.

    I'll go by the link you put and update my firmware.

    Again Richard thanks for your help, I appreciate it!

    If it still doesn't work, I'll post back by the end of the day. Otherwise, thank you again!

    - KB