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sci / sci.electronics.repair / Re: Booting a PowerWave 604|132.

SubjectAuthor
* Booting a PowerWave 604|132.peter
+- Re: Booting a PowerWave 604|132.legg
+- Re: Booting a PowerWave 604|132.<bp
`- Re: Booting a PowerWave 604|132.legg

1
Subject: Booting a PowerWave 604|132.
From: peter@easthope.ca
Newsgroups: sci.electronics.repair
Organization: A noiseless patient Spider
Date: Sun, 29 Dec 2024 04:41 UTC
Path: eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: peter@easthope.ca
Newsgroups: sci.electronics.repair
Subject: Booting a PowerWave 604|132.
Date: 28 Dec 2024 21:41:21 -0700
Organization: A noiseless patient Spider
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Hi,

I have a Macintosh clone PowerWave 604|132. The user's manual is
available from the Internet Archive and other servers.

The power button on the front panel and the button on the keyboard
both cause the fan in the power supply to spin and the LED in the
front to illuminate. The display remains black.

I've tried two monitors and a second PCI video card. The display
remains black in all cases.
Neither the programmer's interrupt button nor reset button has
effect. Meaning the Apple ROM isn't working? The CPU isn't working?
Should an audible tone come from the speaker when the machine
starts?

One memory card is in each of two banks of sockets. Removing either
card yields no change.

The clock battery is probably dead but shouldn't cause this
behaviour; correct?

Adjacent to the memory are ROM and cache SSIMMs in sockets.
Reseating is worth trying but the cards are stuck hard in the sockets.

Other ideas? Poke around with an oscilloscope?

Thanks, ... P.

Subject: Re: Booting a PowerWave 604|132.
From: legg
Newsgroups: sci.electronics.repair
Organization: A noiseless patient Spider
Date: Sun, 29 Dec 2024 17:33 UTC
References: 1
Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: legg@nospam.magma.ca (legg)
Newsgroups: sci.electronics.repair
Subject: Re: Booting a PowerWave 604|132.
Date: Sun, 29 Dec 2024 12:33:16 -0500
Organization: A noiseless patient Spider
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On 28 Dec 2024 21:41:21 -0700, peter@easthope.ca wrote:

>Hi,
>
>I have a Macintosh clone PowerWave 604|132. The user's manual is
>available from the Internet Archive and other servers.
>
>The power button on the front panel and the button on the keyboard
>both cause the fan in the power supply to spin and the LED in the
>front to illuminate. The display remains black.
>
>I've tried two monitors and a second PCI video card. The display
>remains black in all cases.
>
>Neither the programmer's interrupt button nor reset button has
>effect. Meaning the Apple ROM isn't working? The CPU isn't working?
>
>Should an audible tone come from the speaker when the machine
>starts?
>
>One memory card is in each of two banks of sockets. Removing either
>card yields no change.
>
>The clock battery is probably dead but shouldn't cause this
>behaviour; correct?
>
>Adjacent to the memory are ROM and cache SSIMMs in sockets.
>Reseating is worth trying but the cards are stuck hard in the sockets.
>
>Other ideas? Poke around with an oscilloscope?
>
>Thanks, ... P.

I can see the original owner of this machine, after using it for
a decade, being unable to answer any of your questions.

Mac users were never encouraged to fix their own machines.

RL

Subject: Re: Booting a PowerWave 604|132.
From: <bp@www.zefox.net>
Newsgroups: sci.electronics.repair
Organization: A noiseless patient Spider
Date: Sun, 29 Dec 2024 17:55 UTC
References: 1
Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: <bp@www.zefox.net>
Newsgroups: sci.electronics.repair
Subject: Re: Booting a PowerWave 604|132.
Date: Sun, 29 Dec 2024 17:55:30 -0000 (UTC)
Organization: A noiseless patient Spider
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peter@easthope.ca wrote:
> Hi,
>
> I have a Macintosh clone PowerWave 604|132. The user's manual is
> available from the Internet Archive and other servers.
>
> The power button on the front panel and the button on the keyboard
> both cause the fan in the power supply to spin and the LED in the
> front to illuminate. The display remains black.
>
> I've tried two monitors and a second PCI video card. The display
> remains black in all cases.
>
> Neither the programmer's interrupt button nor reset button has
> effect. Meaning the Apple ROM isn't working? The CPU isn't working?
>
> Should an audible tone come from the speaker when the machine
> starts?
>
> One memory card is in each of two banks of sockets. Removing either
> card yields no change.
>
> The clock battery is probably dead but shouldn't cause this
> behaviour; correct?
>
> Adjacent to the memory are ROM and cache SSIMMs in sockets.
> Reseating is worth trying but the cards are stuck hard in the sockets.
>
> Other ideas? Poke around with an oscilloscope?

No direct experience with Mac clones, but all of my genuine
Apple machines failed from capacitor leakage causing corrosion
of the motherboards and eventual failure. How does the board(s)
look under a close inspection? Solder joints can also fail from
through-plating residue trapped in vias. Neither is likely but
both are fixable if they can be seen.

Probing with a 'scope can't hurt, but you'll want some notion
where to look for activity. Maybe near but not on a crystal?
Without some sort of schematic it'll be a long search.

There are YouTube channels devoted to fixing vintage computers,
some of those might be worth a look.

Good luck,

bob prohaska

Subject: Re: Booting a PowerWave 604|132.
From: legg
Newsgroups: sci.electronics.repair
Organization: A noiseless patient Spider
Date: Sun, 29 Dec 2024 18:27 UTC
References: 1
Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: legg@nospam.magma.ca (legg)
Newsgroups: sci.electronics.repair
Subject: Re: Booting a PowerWave 604|132.
Date: Sun, 29 Dec 2024 13:27:19 -0500
Organization: A noiseless patient Spider
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On 28 Dec 2024 21:41:21 -0700, peter@easthope.ca wrote:

>Hi,
>
>I have a Macintosh clone PowerWave 604|132. The user's manual is
>available from the Internet Archive and other servers.
>
>The power button on the front panel and the button on the keyboard
>both cause the fan in the power supply to spin and the LED in the
>front to illuminate. The display remains black.
>
>I've tried two monitors and a second PCI video card. The display
>remains black in all cases.
>
>Neither the programmer's interrupt button nor reset button has
>effect. Meaning the Apple ROM isn't working? The CPU isn't working?
>
>Should an audible tone come from the speaker when the machine
>starts?
>
>One memory card is in each of two banks of sockets. Removing either
>card yields no change.
>
>The clock battery is probably dead but shouldn't cause this
>behaviour; correct?
>
>Adjacent to the memory are ROM and cache SSIMMs in sockets.
>Reseating is worth trying but the cards are stuck hard in the sockets.
>
>Other ideas? Poke around with an oscilloscope?
>
>Thanks, ... P.

You might visually inspect the motherboard to see if there are any
signs of gross component damage.

pinholes in graphic processor chip bodies
bulging electrolytic capacitors
normal supply voltages/ripple (inspect power supply internally)
loose connectors.

remove, clean and reseat anything in a socket.

try booting from a removable disc.

RL

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