Mac OS 9 Lives! (Classic Mac OS Forum)

Classic Mac Hardware (Troubleshooting, Upgrading, & Modifying) => General Hardware Discussions => Topic started by: Syntho on August 19, 2019, 03:34:08 PM

Title: Mac turning on by itself?
Post by: Syntho on August 19, 2019, 03:34:08 PM
I noticed that my 9600 mysteriously was booted yesterday, so I turned it off. I went to sleep, then woke up to it on again. I came into the studio and shut it down, but as soon as I did it... turned on again. The Shut Down command is now functioning as a reboot command. It refuses to turn off. Why is this?
Title: Re: Mac turning on by itself?
Post by: Greystash on August 19, 2019, 03:51:05 PM
That used to happen constantly with my 8100 and it drove me nuts!! It would turn on every night and I would turn it off, then 30mins later it would turn on again. It would get worse and start up again as soon as I turned it off!
I can't remember if I ever fixed this, but have you tried resetting PRAM, PMU etc? I removed the PMU battery from mine, maybe this solved it? It was too long ago...
Title: Re: Mac turning on by itself?
Post by: OS923 on August 21, 2019, 10:33:21 AM
Remove the preferences of the energy saver control panel.
Title: Re: Mac turning on by itself?
Post by: IIO on August 22, 2019, 03:49:39 AM
it tries to get your attention.
Title: Re: Mac turning on by itself?
Post by: macStuff on August 22, 2019, 05:06:39 AM
get a powerbar with a switch and call it a day
Title: Re: Mac turning on by itself?
Post by: GaryN on August 22, 2019, 04:07:03 PM
Remove the preferences of the energy saver control panel.
THIS is the correct answer. Energy Saver has the ability to turn the computer on and off at selected times.
If the prefs get scrambled, weird shit happens.
it tries to get your attention.
Just like people do
Title: Re: Mac turning on by itself?
Post by: Syntho on August 22, 2019, 09:39:26 PM
I hadn't booted it in like 2 months though. Suddenly it came alive after 2 months, then the issue started. Hmm.
Title: Re: Mac turning on by itself?
Post by: GaryN on August 23, 2019, 12:12:54 AM
Well, there is always the possibility that something else less likely has gone wrong, but a simple trashing of prefs is a common first repair step.
Title: Re: Mac turning on by itself?
Post by: OS923 on August 23, 2019, 08:52:36 AM
trashing of prefs is a common first repair step.
Can work for internet connections too.
Title: Re: Mac turning on by itself?
Post by: Philgood on August 23, 2019, 09:03:58 AM
But did you trashed the preference file actually and did it worked?
Title: Re: Mac turning on by itself?
Post by: OS923 on August 24, 2019, 01:34:28 AM
I remember that I was trying client/server software but I didn't get the internet connections to work. I trashed the preferences of I think the AppleTalk, TCP/IP, and Internet control panels. Then it did what I configured in the control panels.
Title: Re: Mac turning on by itself?
Post by: IIO on August 26, 2019, 04:32:49 AM
isnt "reboot after power failure 0/1" part of the PRAM?
Title: Re: Mac turning on by itself?
Post by: Syntho on September 14, 2019, 11:25:13 PM
I used the ASR method to restore my old settings recently. It was fine for a few days, then whammo, it starts up in the middle of the night again. I reset the PRAM and everything too. Trashing the preferences doesn't seem to work either.  ???
Title: Re: Mac turning on by itself?
Post by: IIO on September 20, 2019, 06:38:38 PM
PSU reset also?
Title: Re: Mac turning on by itself?
Post by: OS923 on September 22, 2019, 01:14:54 AM
Try the CUDA button.
Title: Re: Mac turning on by itself?
Post by: Syntho on September 22, 2019, 06:02:02 PM
PSU reset also?

How do I reset the PSU?

Try the CUDA button.

I'll try this too.
Title: Re: Mac turning on by itself?
Post by: IIO on September 22, 2019, 06:06:12 PM
cuda and pmu reset is the same thing. it is the button beside the battery and it has to be pressed for about 5 seconds while the machine is off.

some computers have tow buttons then it is the one closer to the battery. :)
Title: Re: Mac turning on by itself?
Post by: Syntho on September 22, 2019, 06:08:08 PM
When you said PSU I thought you meant that there's a button on the PSU (Power Supply Unit). I'll get to trying this and see if I come up with anything. The last time I did a CUDA reset was a couple years back when I got all of my 9600s perfected.
Title: Re: Mac turning on by itself?
Post by: Syntho on October 03, 2019, 10:33:44 PM
I finally got around to resetting CUDA by using that little button, and while I was at it I reset the motherboard by removing the battery and power cycling it. All was fine for a few hours, then whammo, my Mac turned itself on again. Once again, every time I click Shut Down, it turns right back on like I'm hitting Reset.

So far I've reset the PRAM, reset CUDA, as well as the motherboard, plus started off with a fresh OS install to see if that would fix the power management extensions. Nothing worked.

Maybe there's something funny going on with the ADB port or keyboard I'm using since there's a power button on it. I'll do some experimentation and see what happens.
Title: Re: Mac turning on by itself?
Post by: Syntho on October 07, 2019, 05:40:14 AM
I think this is an ADB issue after all. I unplugged the ADB cable and for two days now it hasnít started by itself.