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Apple Computing Products:
macOS - Desktop Hardware
iMac G3 (Bondi-blue 233MHz tray loader) screen stays dark after firmware upgrade
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<blockquote data-quote="Fabri91" data-source="post: 1692314" data-attributes="member: 366507"><p>I've recently had the opportunity to play around a bit with a tray-loading iMac G3 (233 MHz model), and after a quick and painless RAM upgrade I decided to try to install OSX 10.2, where I neglected to perform the firmware upgrade prior to OS install. I'm aware that there are some issues with the later slot-loading models and the screen timing being borked on OSX, but this seems to be a different issue: OSX 10.2 worked fine, with the exception of the system booting to OpenFirmware needing the "mac-boot" command to load the OS.</p><p></p><p>However, after learning that a firmware upgrade was available I deciced to perform it anyway to prevent any further issues. To do this I re-installed the factory-shipped Mac OS 8.5, which worked perfectly. Afterwards I performed the firmware upgrade and everything seemed to go well, up to and including a progress bar being displayed upon reboot, after which the screen went dark and hasn't been able to turn on.</p><p></p><p>If I try to boot the machine disk access sounds can be heard, like during a normal boot, with the exception of the monitor staying dark.</p><p></p><p>Some other possibly important points:</p><p></p><ul> <li data-xf-list-type="ul">the firmware upgrade was performed with the Real-time clock battery removed, due to it being flat and waiting on a replacement. Could this cause the firmware corruption?</li> <li data-xf-list-type="ul">the firmware upgrade was performed with the Real-time clock battery removed, due to it being flat and waiting on a replacement. Could this cause the firmware corruption?</li> <li data-xf-list-type="ul">No VGA port available to connect a second monitor</li> </ul><p></p><p>I have a 160GB IDE hard-drive laying around, if it could be useful</p><p></p><p>From what I've read in these early models the firmware is actually stored in a chip on the detachable CPU card. If that's the case, <strong>could a CPU card replacement resolve the issue?</strong> If not, could it be helped by replacing the logic board and/or any other components?</p><p></p><p>Thank you for any help!</p></blockquote><p></p>
[QUOTE="Fabri91, post: 1692314, member: 366507"] I've recently had the opportunity to play around a bit with a tray-loading iMac G3 (233 MHz model), and after a quick and painless RAM upgrade I decided to try to install OSX 10.2, where I neglected to perform the firmware upgrade prior to OS install. I'm aware that there are some issues with the later slot-loading models and the screen timing being borked on OSX, but this seems to be a different issue: OSX 10.2 worked fine, with the exception of the system booting to OpenFirmware needing the "mac-boot" command to load the OS. However, after learning that a firmware upgrade was available I deciced to perform it anyway to prevent any further issues. To do this I re-installed the factory-shipped Mac OS 8.5, which worked perfectly. Afterwards I performed the firmware upgrade and everything seemed to go well, up to and including a progress bar being displayed upon reboot, after which the screen went dark and hasn't been able to turn on. If I try to boot the machine disk access sounds can be heard, like during a normal boot, with the exception of the monitor staying dark. Some other possibly important points: [LIST] [*]the firmware upgrade was performed with the Real-time clock battery removed, due to it being flat and waiting on a replacement. Could this cause the firmware corruption? [*]the firmware upgrade was performed with the Real-time clock battery removed, due to it being flat and waiting on a replacement. Could this cause the firmware corruption? [*]No VGA port available to connect a second monitor [/LIST] I have a 160GB IDE hard-drive laying around, if it could be useful From what I've read in these early models the firmware is actually stored in a chip on the detachable CPU card. If that's the case, [B]could a CPU card replacement resolve the issue?[/B] If not, could it be helped by replacing the logic board and/or any other components? Thank you for any help! [/QUOTE]
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Apple Computing Products:
macOS - Desktop Hardware
iMac G3 (Bondi-blue 233MHz tray loader) screen stays dark after firmware upgrade
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