Re: Strange IIci behavior, cont.

[Manuel Marques]

Yeps. I've tried the back button.

I apologize for breaking the etiquette rules but I forgot that Outlook 2003
puts the whole message below my reply :(

Thanks

Manuel Jorge M. Marques
  _  

[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>  

http://manuelmarque.no.sapo.pt

-Original Message-
From: Vintage Macs [mailto:[EMAIL PROTECTED] On Behalf Of
Gregg Eshelman
Sent: terça-feira, 13 de Setembro de 2005 5:53
To: Vintage Macs
Subject: Re: Strange IIci behavior, cont.

Did you try the power button on the back of the
computer? It's below the power supply.

--- Manuel Marques <[EMAIL PROTECTED]> wrote:

> "The PRAM battery is irrelevant to powering up on
> these models."
> 
> Sooo, even if I change my battery, my IIci will not
> work. Right?
> It made sense that, if I didn't have any power to
> establish any ADB
> connection, that the IIci wouldn't power up using
> the keyboard. If the
> battery doesn't supply power, then what is it? The
> PSU?


It will be total Fandemonium!
August (Fri) 4th, (Sat) 5th & (Sun) 6th, 2006
http://www.fandemonium.org



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Re: Strange IIci behavior, cont.

[Gregg Eshelman]

Did you try the power button on the back of the
computer? It's below the power supply.

--- Manuel Marques <[EMAIL PROTECTED]> wrote:

> "The PRAM battery is irrelevant to powering up on
> these models."
> 
> Sooo, even if I change my battery, my IIci will not
> work. Right?
> It made sense that, if I didn't have any power to
> establish any ADB
> connection, that the IIci wouldn't power up using
> the keyboard. If the
> battery doesn't supply power, then what is it? The
> PSU?


It will be total Fandemonium!
August (Fri) 4th, (Sat) 5th & (Sun) 6th, 2006
http://www.fandemonium.org



__ 
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Re: Strange IIci behavior, cont.

[Jeff Walther]

From: "Manuel Marques" <[EMAIL PROTECTED]>
Subject: Re: Strange IIci behavior, cont.
Date: Mon, 12 Sep 2005 17:20:46 +0100
In-reply-to: <[EMAIL PROTECTED]>
Message-ID: <[EMAIL PROTECTED]>

"The PRAM battery is irrelevant to powering up on these models."

Sooo, even if I change my battery, my IIci will not work. Right?
It made sense that, if I didn't have any power to establish any ADB
connection, that the IIci wouldn't power up using the keyboard. If the
battery doesn't supply power, then what is it? The PSU?


First, please learn to trim your quoted text.  It is rude to repost 
all of the message to which you are replying.   One way to learn to 
trim quoted text is to put your new message *after* the quoted text. 
This generally results in a more readable posting and you'll learn to 
always trim away that unneeded quoted text.


For example, in your message, which I've quoted above, you actually 
requoted the relevant bit of the previous message before your text. 
That is all that you needed to quote.  You should have trimmed *all* 
of the quoted text which you left at the bottom of your message.


Regardless of any personal preferences folks on this list may have, 
your last couple of messages quoted the list footers as well as the 
previous messages.  That is explicitly against the etiquette of this 
list.


The PSU supplies a 5V trickle even when the computer is turned off. 
The power on circuitry connects that 5V trickle to the Power_on line 
(forget the official name for it) on the power supply to turn it on. 
Then there's some circuitry on the motherboard to keep it connected 
so that the power supply stays on until the Shut Down command is 
issued.


The battery is only used to maintain the real time clock and the PRAM 
memory when the power supply is disconnected from the mains. 
Otherwise the 5V trickle also maintains these functions.


Jeff Walther

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Re: Strange IIci behavior, cont.

[Manuel Marques]

"The PRAM battery is irrelevant to powering up on these models."

Sooo, even if I change my battery, my IIci will not work. Right?
It made sense that, if I didn't have any power to establish any ADB
connection, that the IIci wouldn't power up using the keyboard. If the
battery doesn't supply power, then what is it? The PSU?

Greets,

Manuel Jorge M. Marques
  _  

[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>  

http://manuelmarque.no.sapo.pt


-Original Message-
From: Vintage Macs [mailto:[EMAIL PROTECTED] On Behalf Of
Jeff Walther
Sent: segunda-feira, 12 de Setembro de 2005 0:44
To: Vintage Macs
Subject: Re: Strange IIci behavior, cont.

>Date: Sat, 10 Sep 2005 20:01:11 -0500
>From: Jeff Grant <[EMAIL PROTECTED]>

>The IIci has the Astec power supply, and I think you're right, it may
>be getting quirky.  I have a bit of other odd behavior though.  I was
>under the impression, (but could be totally wrong) that the Quadra 700
>power supply would work in the IIci being the same form factor with
>same listed voltages.  When I try my Quadra power supply in the IIci,
>the light flickers again, but won't power up.  This happens if the PDS
>card is in or removed.  Nada happens.  When I put the PSU back into
>the Quadra, the 700 boots up just fine.  It happens to be the GE model
>from the 700.  When I put the IIci's original Astec back in, it boots
>up fine if no PDS card is in, as I described before.  So maybe it is
>the mobo??  Maybe both . . . hmmm.  Oh yeah, I live in Fredericksburg,
>Va.

There is a fairly common failure of the IIci motherboard which 
interferes with powering up.  Many of the surface mount capacitors 
are in the vicinity of the power-on circuitry on the motherboard and 
when they leak corrosive, that's the circuitry most likely to be 
damaged.

You may wish to pull your motherboard and examine the rear right 
quadrant for discoloration--slightly darker, hint of brown.

My IIci had this failure.  I ended up bypassing a motherboard trace 
with some wire, because one of the vias through which the trace 
passed was corroded completely.   I also cleaned the motherboard and 
replaced the caps.

You might try your IIci PS in the Q700 to see what you can see.

The two power supplies should be interchangeable.  However, the 
current required to power up might be different and that could be why 
one power supply come on and the other doesn't.  If the MB is 
delivering below spec. one PS may have more head room than the other.

Other compatible power supplies include IIcx, IIci, IIvi, IIvx, Q700, 
C650, Q650, 7100.

The PRAM battery is irrelevant to powering up on these models.

Jeff Walther

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Re: Strange IIci behavior, cont.

[Jeff Walther]

Date: Sat, 10 Sep 2005 20:01:11 -0500
From: Jeff Grant <[EMAIL PROTECTED]>



The IIci has the Astec power supply, and I think you're right, it may
be getting quirky.  I have a bit of other odd behavior though.  I was
under the impression, (but could be totally wrong) that the Quadra 700
power supply would work in the IIci being the same form factor with
same listed voltages.  When I try my Quadra power supply in the IIci,
the light flickers again, but won't power up.  This happens if the PDS
card is in or removed.  Nada happens.  When I put the PSU back into
the Quadra, the 700 boots up just fine.  It happens to be the GE model
from the 700.  When I put the IIci's original Astec back in, it boots
up fine if no PDS card is in, as I described before.  So maybe it is
the mobo??  Maybe both . . . hmmm.  Oh yeah, I live in Fredericksburg,
Va.


There is a fairly common failure of the IIci motherboard which 
interferes with powering up.  Many of the surface mount capacitors 
are in the vicinity of the power-on circuitry on the motherboard and 
when they leak corrosive, that's the circuitry most likely to be 
damaged.


You may wish to pull your motherboard and examine the rear right 
quadrant for discoloration--slightly darker, hint of brown.


My IIci had this failure.  I ended up bypassing a motherboard trace 
with some wire, because one of the vias through which the trace 
passed was corroded completely.   I also cleaned the motherboard and 
replaced the caps.


You might try your IIci PS in the Q700 to see what you can see.

The two power supplies should be interchangeable.  However, the 
current required to power up might be different and that could be why 
one power supply come on and the other doesn't.  If the MB is 
delivering below spec. one PS may have more head room than the other.


Other compatible power supplies include IIcx, IIci, IIvi, IIvx, Q700, 
C650, Q650, 7100.


The PRAM battery is irrelevant to powering up on these models.

Jeff Walther

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Re: Strange IIci behavior, cont.

[John Niven]

On Sep 10, 2005, at 6:01 PM, Jeff Grant wrote:

The IIci has the Astec power supply, and I think you're right, it may
be getting quirky.  I have a bit of other odd behavior though.  I was
under the impression, (but could be totally wrong) that the Quadra 700
power supply would work in the IIci being the same form factor with
same listed voltages.


I think its the motherboard. But I just wanted to point out that the 
PSU from a PPC 7100 also is a plug in replacement but offers some 
increased Wattage. I actually bought a 7100 for $5 and used its PSU for 
one of my IIci.


PPC7100 running 7.5.5 .. just an outdated slow computer.

Mac IIci running 6.0.8 . wow

:-)

John


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Strange IIci behavior, cont.

[Jeff Grant]

Thanks for the replys everybody.  Much appreciated.


> Probably the power supply getting wimpy.
> where do you live?
> johnsn

I'm thinking the same thing.  The power supply is getting weak and
needs to be replaced.

>  >>Daystar Turbo 040
> 
> the cache card<<
> 
> They're both dead.  I've had the same symptoms from the same cards.
> 
> If you can find known good cards of both stripes, the IIci will be back to 
> "normal."
> 
> Donn
> 
I'm not sure about the cards being dead.  The cache card worked fine
the last time I had it installed which was only about a month or so
ago.  It's been stored away in an antistatic bag, so I can't see any
reason it would have died.

> Out of curiosity, which power supply do you have? I've
> seen both Astec and GE in IIci's (and IIcx's) and have
> found the Astecs to be quirky. The GE ones are more
> reliable. It sounds like it's a problem with the slot
> so I'm willing to suspect the motherboard first, but
> do check on the power supply as well.

The IIci has the Astec power supply, and I think you're right, it may
be getting quirky.  I have a bit of other odd behavior though.  I was
under the impression, (but could be totally wrong) that the Quadra 700
power supply would work in the IIci being the same form factor with
same listed voltages.  When I try my Quadra power supply in the IIci,
the light flickers again, but won't power up.  This happens if the PDS
card is in or removed.  Nada happens.  When I put the PSU back into
the Quadra, the 700 boots up just fine.  It happens to be the GE model
from the 700.  When I put the IIci's original Astec back in, it boots
up fine if no PDS card is in, as I described before.  So maybe it is
the mobo??  Maybe both . . . hmmm.  Oh yeah, I live in Fredericksburg,
Va.

thanks again

Jeff M Grant   



> Hi all,
> 
> Last night my IIci turned off while I was using it.  Bummer.  There
> was no power outtage or anything, it just powered off after running
> for 15min or so.  When I tried to reboot, the green power light
> flickered but the Mac wouldn't kick on.  I suspected the power supply,
> but didn't have another to try.  When I remove the Daystar Turbo 040
> from the PDS slot, the Mac comes on just like normal.  Bad Turbo card?
>  Maybe, maybe not.  When I put the old cache card in the slot, the mac
> has the same symptoms, flickering power light.  When the cache card is
> removed, it boots up fine again. I've reset the PRAM, etc to no avail.
>  She won't come up with a card in the PDS slot, period.  Anyone ever
> seen this behavior?  I guess it could only be the mobo or power
> supply, but I'd hate to have to buy both parts. . .
> 
> thanks,
> 
> Jeff M. Grant
> www.cheapotech.net

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