| PowerBook 3400c Power Supply [message #347392] |
Fri, 30 June 2017 23:38  |
Marcio T
Messages: 7
Registered: May 2016
Karma: 0
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Junior Member |
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Hello everyone,
I had a trusty PowerBook 3400c which I used to link up to my old Mac Plus.
Recently I decided to buy a 2GB CompactFlash card to make a backup against
a hard disk failure. My plan was to have it as a backup for Mac OS 8.9.
Installation appeared to go smoothly until after the computer rebooted, at
which point it hung at startup. I forced the machine off, then brought it
back up, but it powered down suddenly and went blank. Now it longer powered
on. I tried removing the Lithium Ion battery and the CD-ROM drive, and no
go.
I measured the output voltage on the 45W power brick (Macintosh PowerBook
45W AC Adapter, M4895, APS-76) and it is reading 0 volts at the terminal.
I suspect that the added power load of the CompactFlash card fried the
power supply. Does this sound plausible?
Anyhow, assuming it is a burned out power supply, what are my options to
replace it? I notice there are several 65W power supplies for iBooks that
appear to have the same barrel connector. Would this be compatible with the
PowerBook 3400c? I figure the 20W headroom might be a good thing if it
works.
Thank you for any suggestions.
-- Marcio
UPDATE: I found out that it is not possible to measure the voltage on the
barrel connector using a multimeter since the tip and the barrel are not in
fact live. I also noticed that the green LED on the computer is coming on,
leading me to suspect the power supply may be good. I tried resetting the
power management using the button on the back and had no luck. At this
point, I fear I may have fried the MB. Does anyone think getting a new
power supply is worthwhile at this point?
--
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| Re: PowerBook 3400c Power Supply [message #347404 is a reply to message #347392] |
Sat, 01 July 2017 11:28  |
William
Messages: 17
Registered: September 2014
Karma: 0
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Junior Member |
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I would think that the psu is still good and a compact flash card doesn't
draw enough power to fry the psu as it is basically just a big ram card
with no moving parts what I would do is reset the pmu after removing the
compact flash card reinstall the cd rom then restart the book normally
and see if you get any joy let me know.
Will
On Sat, Jul 1, 2017 at 4:38 AM, Marcio T <marciot.freeshell.org@gmail.com>
wrote:
> Hello everyone,
>
> I had a trusty PowerBook 3400c which I used to link up to my old Mac Plus.
> Recently I decided to buy a 2GB CompactFlash card to make a backup against
> a hard disk failure. My plan was to have it as a backup for Mac OS 8.9.
> Installation appeared to go smoothly until after the computer rebooted, at
> which point it hung at startup. I forced the machine off, then brought it
> back up, but it powered down suddenly and went blank. Now it longer powered
> on. I tried removing the Lithium Ion battery and the CD-ROM drive, and no
> go.
>
> I measured the output voltage on the 45W power brick (Macintosh PowerBook
> 45W AC Adapter, M4895, APS-76) and it is reading 0 volts at the terminal.
> I suspect that the added power load of the CompactFlash card fried the
> power supply. Does this sound plausible?
>
> Anyhow, assuming it is a burned out power supply, what are my options to
> replace it? I notice there are several 65W power supplies for iBooks that
> appear to have the same barrel connector. Would this be compatible with the
> PowerBook 3400c? I figure the 20W headroom might be a good thing if it
> works.
>
> Thank you for any suggestions.
>
> -- Marcio
>
>
>
> UPDATE: I found out that it is not possible to measure the voltage on the
> barrel connector using a multimeter since the tip and the barrel are not in
> fact live. I also noticed that the green LED on the computer is coming on,
> leading me to suspect the power supply may be good. I tried resetting the
> power management using the button on the back and had no luck. At this
> point, I fear I may have fried the MB. Does anyone think getting a new
> power supply is worthwhile at this point?
>
> --
> --
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> You received this message because you are a member of the Vintage Macs
> group.
> The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our
> netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml
> To post to this group, send email to vintage-macs@googlegroups.com
> To leave this group, send email to vintage-macs+unsubscribe@
> googlegroups.com
> For more options, visit this group at http://groups.google.com/
> group/vintage-macs
>
> Support for older Macs: http://lowendmac.com/services/
> ---
> You received this message because you are subscribed to the Google Groups
> "Vintage Macs" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to vintage-macs+unsubscribe@googlegroups.com.
> For more options, visit https://groups.google.com/d/optout.
>
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| Re: PowerBook 3400c Power Supply [message #347406 is a reply to message #347404] |
Sat, 01 July 2017 13:03 |
Jason Johnson
Messages: 131
Registered: August 2012
Karma: 0
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Senior Member |
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the 3400 has a pram battery that is mounted over the left side speaker. when it leaks the acid rots the screen, keyboard and motherboard connectors under it. You may want to take it apart and see if you can clean and salvage it. Out of 3 I have had only 1 I could save (not mine, bought off eBay).
________________________________
From: vintage-macs@googlegroups.com <vintage-macs@googlegroups.com> on behalf of William Bowles <williambowles32@gmail.com>
Sent: Saturday, July 1, 2017 8:28:35 AM
To: vintage-macs@googlegroups.com
Subject: Re: PowerBook 3400c Power Supply
I would think that the psu is still good and a compact flash card doesn't draw enough power to fry the psu as it is basically just a big ram card with no moving parts what I would do is reset the pmu after removing the compact flash card reinstall the cd rom then restart the book normally and see if you get any joy let me know.
Will
On Sat, Jul 1, 2017 at 4:38 AM, Marcio T <marciot.freeshell.org@gmail.com<mailto:marciot.freeshell.org@gmail.com>> wrote:
Hello everyone,
I had a trusty PowerBook 3400c which I used to link up to my old Mac Plus. Recently I decided to buy a 2GB CompactFlash card to make a backup against a hard disk failure. My plan was to have it as a backup for Mac OS 8.9. Installation appeared to go smoothly until after the computer rebooted, at which point it hung at startup. I forced the machine off, then brought it back up, but it powered down suddenly and went blank. Now it longer powered on. I tried removing the Lithium Ion battery and the CD-ROM drive, and no go.
I measured the output voltage on the 45W power brick (Macintosh PowerBook 45W AC Adapter, M4895, APS-76) and it is reading 0 volts at the terminal. I suspect that the added power load of the CompactFlash card fried the power supply. Does this sound plausible?
Anyhow, assuming it is a burned out power supply, what are my options to replace it? I notice there are several 65W power supplies for iBooks that appear to have the same barrel connector. Would this be compatible with the PowerBook 3400c? I figure the 20W headroom might be a good thing if it works.
Thank you for any suggestions.
-- Marcio
UPDATE: I found out that it is not possible to measure the voltage on the barrel connector using a multimeter since the tip and the barrel are not in fact live. I also noticed that the green LED on the computer is coming on, leading me to suspect the power supply may be good. I tried resetting the power management using the button on the back and had no luck. At this point, I fear I may have fried the MB. Does anyone think getting a new power supply is worthwhile at this point?
--
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Support for older Macs: http://lowendmac.com/services/
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You received this message because you are a member of the Vintage Macs group.
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To post to this group, send email to vintage-macs@googlegroups.com
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Support for older Macs: http://lowendmac.com/services/
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