startup chime twice on cold boot

[enigmaaaaa]

When my Color Classic starts from a cold boot, this is what happens:

1. Upon powering on, the Mac startup chime immediately sounds.

2. The screen then lights up, followed by the happy Mac appearing on the screen,

3. Immediately after the happy Mac appears, the computer reboots.

4. the Mac startup chime sounds upon reboot

5. The happy Mac appears again, and then it boots into the OS.

Any idea why the machine would do that? Other than that, the machine works just fine without any issues.

 

[ClassicHasClass]

PRAM problem?

Bad or weird partition on the disk?

 

[enigmaaaaa]

PRAM has been zapped. The hard drive has been reinitialized. It's a straightfoward clean install.

 

[Charlieman]

Have you changed the RAM, hard disk or PDS card? Maybe something is drawing a little more power than before. Or it could just be that your psu is a little low on one of the lines.

 

[enigmaaaaa]

I acquired this baby a few weeks ago and it came with a stock CC logic board, 10 Meg of RAM, a 700 MB Qauntum drive, and an Asante PDS LC ethernet card in it. And it came with this issue as-is.

I have since put in a new logic board (LC 575 board), and it still does the same thing.

And that leaves the hard drive the only thing yet to be swapped to test it out (I am not sure how to get to the had drive, looks like I have to remove the analog board to get to it?)

"Or it could just be that your psu is a little low on one of the lines" - replace the power supply?

 

[Osgeld]

"Or it could just be that your psu is a little low on one of the lines" - replace the power supply?

or rebuild it

 

[Dog Cow]

Is the Color Classic 32-bit clean?

 

[Byrd]

Is the PRAM battery good?

JB

 

[Buickguy]

2nd on the pram battery

 

[enigmaaaaa]

The PRAM battery is definitely NO good. I am going to replace it and see what happens. Thanks.

 

[PowerPup]

Yeah. Without a working PRAM battery my PowerMac 6100 does the same thing. I actually have to press the power button twice in order for it to work. Then it will reboot itself and start Mac OS. :lol:

 

[phreakout]

I wonder, but is it possible the system software doesn't have the correct or needed enabler for the CC? Depending on the system software version, was there ever an enabler required for it to work right on the CC? Maybe, also, there is a corrupt extension, too?

73s de Phreakout. :rambo:

 

[Dog Cow]

That's similar to what I was thinking when I asked about 32-bit clean. The dirty Macs had an extension which would cause the so-called "stutter start," which was expected behavior.

 

[John8520]

My Quadra 700 does the exact same thing when booting 7.6.1. (Maybe other OSs but I haven't run any others in a long while.) It chimes, starts just enough to turn the CRT LED green, then it reboots. I've been told this is because 7.6.1 needs something at boot that macs as old as the q700 don't have, so it has to load the file or whatever into PRAM (I think) then reset and boot normally.

Apparently I even made a video of it a little over a year ago. http://www.youtube.com/watch?v=Jb-JKOSv7gk

 

[enigmaaaaa]

System 7.6.1. is exactly what I am booting, and exactly as shown in your video. Very interesting theory. (I am yet order a new battery, I shall find out in a few weeks)

 

[olePigeon]

If you have a Fry's Electronics, grab the battery there. They have them for round $5 or $6. Otherwise places like Radioshack charge an unbelievable $21 for a battery.

 

[enigmaaaaa]

I finally got around and put in a new battery: it did the trick. No more double chime/reboot.