I have G4 AGP (450Mhz) which I have just upgraded with a Sonnet Encore 1.8Ghz processor and I have been running it ok for about a week and a halve with tiger 10.4.11 with all the latest updates and all was fine working great. I did a upgrade with Leopard last night and all went ok no error mesages or it saying that my machine was not supported it finshed installing ok and then rebooted and it got as far as the gray screen and the apple and then shut down. Tried rebooting several times and stll the same. I was able to boot into 9.2.2 on another disk installed and it was ok., it was getting late so I switched every thng of and I was going to have a look at it the next day when I came home from work now it won't switch on at all now dead as a Dodo. I know there's power because my monitor is plugged into the same power supply and that has the power light on. anybody got any idea's.,
-
Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.
Dead G4 (Sawtooth) AGP
- Thread starter Retroman
- Start date
porter
Well-known member
Start back tracking.
My G3 B+W refused to start, I opened it up and there is a little reset switch on the motherboard, I pushed that and it burst into life. I disassembled the front panel, checked it all out and put it back together, and back to a working machine again.
Personally I would revert to Tiger.
My G3 B+W refused to start, I opened it up and there is a little reset switch on the motherboard, I pushed that and it burst into life. I disassembled the front panel, checked it all out and put it back together, and back to a working machine again.
Personally I would revert to Tiger.
I hit the reset button by the pram battery and it started to work ( well at least it's starting up now) I still got to figure out why Leopard is not booting
what is that reset button for, I know that you can reset the pram by having contorsionist fingers and using the keyboard reset. does that switch do the same or more ?
Thank you porter
what is that reset button for, I know that you can reset the pram by having contorsionist fingers and using the keyboard reset. does that switch do the same or more ?
Thank you porter
equill
Well-known member
The PMU of the Sawtooth and later Macs is a little more all-encompassing than the PMUs of older PowerBooks. Newer PMUs are rather more wide-ranging, and Apple describes them as 'computers-within-a-computer'. They can be finicky, and it is reported that the Sawtooth is in the front row of those. A good start is a complete reset of your logic board, as porter writes.
Remove the Sawtooth from the mains power, and remove its PRAM battery. Leave it so not for just the usual 20min, but overnight. Then replace the PRAM battery before you reconnect to the mains. Hold in the PMU for just one press of about a second. (Don't hold it in for 40sec as you would with a CUDA switch.) Make sure that you don't handle the circuitry around the PMU, even if you are wearing a wrist-strap. Don't let the switch 'bounce', because that will count as a second press, which will flatten the battery overnight and require you to reset the MLB again. Speed of your CPU notwithstanding, I would second porter's recommendation that you revert to 10.4.11 on the Sawtooth when you have it going. If even the described treatment will not wake up your Sawtooth, you may be faced with getting hold of its HDD in Target Disk mode to wipe the HDD completely before you re-install OS X v10.4.11.
de
Remove the Sawtooth from the mains power, and remove its PRAM battery. Leave it so not for just the usual 20min, but overnight. Then replace the PRAM battery before you reconnect to the mains. Hold in the PMU for just one press of about a second. (Don't hold it in for 40sec as you would with a CUDA switch.) Make sure that you don't handle the circuitry around the PMU, even if you are wearing a wrist-strap. Don't let the switch 'bounce', because that will count as a second press, which will flatten the battery overnight and require you to reset the MLB again. Speed of your CPU notwithstanding, I would second porter's recommendation that you revert to 10.4.11 on the Sawtooth when you have it going. If even the described treatment will not wake up your Sawtooth, you may be faced with getting hold of its HDD in Target Disk mode to wipe the HDD completely before you re-install OS X v10.4.11.
de
all fixed now I had to press the magic reset button next to the pram battery and a phone call to macupgrades where I got the Sonnet 1.8Ghz prosessor and they advised to select the "Archive and install" option when doing the Leopard install, all working ok now. Thanks for your help
