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Mac Forum / General / Portable Macs / July 2006Powerbook G4 won't boot after shuthdown
I have a Powerbook G4/400 (Titanium) recently updated to 10.4.7. I don't usually shutdown the machine (hardly ever), but had have to do this a few time recently. Today, the machine would not boot after a shutdown (restarting was OK). I hear the startup chime, then nothing. The screen is dark. No spinning ball, no Apple logo, no folder with blinking question mark. Nothing. It won't boot from the 10.4 DVD either. It finally occurred to me to push the rest button in the back. I had forgotten its existence. After that the machine booted just fine as if nothing happened. Anybody have a similar experience?? Richard > I have a Powerbook G4/400 (Titanium) recently updated to 10.4.7. > [quoted text clipped - 9 lines] > > Anybody have a similar experience?? Richard- That describes a problem I've had with my Intel Duo iMac. I don't recall when it started doing it, but it was somewhere around the time I updated to 10.4.6. In one situation the machine locked-up with a blue screen, after going through an otherwise normal (but long) shutdown sequence. In another, the screen went dark at about the right time, but the only way to start it up again was to either kill the power, or hold the power button for more than five seconds. In other words, your PB may not really be shutting down. Next time it does it, try pressing and holding the power button for at least five seconds. Then see if it starts up normally. One suggestion by a local Apple repair person, was to reset the power manager (system control manager in the Intel). For the Intel iMac, you remove power, press the power button for five or ten seconds, restore power and start up again. You need to find Apple's procedure for your specific PB if you want to try that. I tried everything I could think of, including downloading software that was supposed to fix everything. Nothing worked, but one day it just stopped doing it! That was just before I upgraded to 10.4.7, and it hasn't done it since. In fact, it shuts down much more quickly than it ever did before. I wonder if your problem with the PB G4 is the result of Apple "fixing" an Intel problem when they released the 10.4.7 update? Fred > That describes a problem I've had with my Intel Duo iMac. I don't recall > when it started doing it, but it was somewhere around the time I updated [quoted text clipped - 3 lines] > I wonder if your problem with the PB G4 is the result of Apple "fixing" an > Intel problem when they released the 10.4.7 update? It is starting to look like my problem is the RAM. There wasn't any complaints about the RAM in the system logs. Then, out of sheer desperation, I booted into OS9. After the startup sequence (remember all those extension icons marching across the bottom of your screen?), I got a pop-up window saying something is wrong with the RAM. I have two 256Meg DIMM cards installed, but the system only recognized 384Megs. I took both memory cards out, reinstalled them, zapped the PRAM and now (knock wood), the PBG4 seems to be feeling much better. Even the dead Airport card I mentioned in a different thread seems to be working. Well, I hope that was the problem. BTW, on this machine (PBG4/400) the reset button in the back supposedly resets every thing (PMU and PRAM?), but I still did the cmd-option-P-R business. Richard |
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