Recaping a Macintosh Portable - test-drb@ccmp.vtda.org

drlegendre＠gmail.com

8 Dec 8 Dec

2:13 a.m.

If this is one of the original Mac Portables (white, wedge-shaped, B&W LCD screen), have you disconnected the HD from the motherboard? The HDs on these machines just love to die, and when they do, they can screw-up the whole machine. If you haven't already eliminated that possibility, I'd do it before you run around replacing anything else. If you can find the correct drive, you can make a cable to adapt it to the portable - but you won't have the low-power feature of the original drive. It's been 15 years, but I went through one of those machines, back when. On Sun, Dec 7, 2014 at 6:26 PM, Matt Patoray <mspproductions at gmail.com> wrote:

...

Hello all, I have a Mac portable that refuses to even attempt to boot. I get random junk on the screen that is different on every power up, no drive activity and no sound. I am thinking the onboard surface mount electrolytics are due for replacement. I was able to read the values off of most of the caps but I was not able to read the follow caps. C4, C5, C15 and C24. Does anyone know what value those caps are? Thanks, Matt Sent from my iPhone

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bensinc＠gmail.com

10:49 a.m.

I have a Portable as well, and that's correct about the battery. It won't boot at all, even with external power, if the battery is dead. Try doing some searching about alternative power supplies. I believe the problem is that the standard power supply can't source enough power to get things started on its own. I've read about people having success using a power supply from a PowerBook 100, or building their own power supplies. On Mon, Dec 8, 2014 at 9:40 AM, Sean Caron <scaron at umich.edu> wrote:

...

Don't they also act funny if the internal battery is dead? You might have to provide a substitute for that voltage. My memory is pretty fuzzy... it's been a while since I've read anything or given any mindshare to a Mac Portable. But I definitely remember they had some strange quirks in their behavior. Best, Sean On Mon, Dec 8, 2014 at 2:13 AM, drlegendre . <drlegendre at gmail.com> wrote:

If this is one of the original Mac Portables (white, wedge-shaped, B&W

LCD

screen), have you disconnected the HD from the motherboard? The HDs on these machines just love to die, and when they do, they can screw-up the whole machine. If you haven't already eliminated that possibility, I'd do it before you run around replacing anything else. If you can find the correct drive, you can make a cable to adapt it to the portable - but you won't have the low-power feature of the original

drive.

It's been 15 years, but I went through one of those machines, back when. On Sun, Dec 7, 2014 at 6:26 PM, Matt Patoray <mspproductions at gmail.com> wrote: > > Hello all, > > I have a Mac portable that refuses to even attempt to boot. > > I get random junk on the screen that is different on every power up, no > drive activity and no sound. > > I am thinking the onboard surface mount electrolytics are due for > replacement. > > I was able to read the values off of most of the caps but I was not

able

to read the follow caps. C4, C5, C15 and C24. Does anyone know what value those caps are? Thanks, Matt Sent from my iPhone

-- Ben Sinclair ben at bensinclair.com

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simski＠dds.nl

11:40 a.m.

No you dont need that, only if you want to change main batteries during sleep. note for this setup you need *two* working main batteries. :-) but do change the caps, and you can substitute the platter of a mac classic 40mb drive and reuse the electronics of the drive in the portable. just dont place the portable upright as the goo in the grives sealing will drip on the platters, killing the heads. simon On 08-12-14 16:52, Ben Sinclair wrote:

...

Also, make sure the extra 9V battery is installed and good! On Mon, Dec 8, 2014 at 9:49 AM, Ben Sinclair <bensinc at gmail.com> wrote:

I have a Portable as well, and that's correct about the battery. It won't boot at all, even with external power, if the battery is dead. Try doing some searching about alternative power supplies. I believe the problem is that the standard power supply can't source enough power to get things started on its own. I've read about people having success using a power supply from a PowerBook 100, or building their own power supplies. On Mon, Dec 8, 2014 at 9:40 AM, Sean Caron <scaron at umich.edu> wrote:

Don't they also act funny if the internal battery is dead? You might have to provide a substitute for that voltage. My memory is pretty fuzzy... it's been a while since I've read anything or given any mindshare to a Mac Portable. But I definitely remember they had some strange quirks in their behavior. Best, Sean On Mon, Dec 8, 2014 at 2:13 AM, drlegendre . <drlegendre at gmail.com> wrote:

If this is one of the original Mac Portables (white, wedge-shaped, B&W

LCD

screen), have you disconnected the HD from the motherboard? The HDs on these machines just love to die, and when they do, they can screw-up the whole machine. If you haven't already eliminated that possibility, I'd do it before you run around replacing anything else. If you can find the correct drive, you can make a cable to adapt it to the portable - but you won't have the low-power feature of the original

drive.

It's been 15 years, but I went through one of those machines, back when. On Sun, Dec 7, 2014 at 6:26 PM, Matt Patoray <mspproductions at gmail.com> wrote: > > Hello all, > > I have a Mac portable that refuses to even attempt to boot. > > I get random junk on the screen that is different on every power up,

no

> drive activity and no sound. > > I am thinking the onboard surface mount electrolytics are due for > replacement. > > I was able to read the values off of most of the caps but I was not

able

> to read the follow caps. C4, C5, C15 and C24. > > Does anyone know what value those caps are? > > Thanks, > > Matt > > Sent from my iPhone >

-- Ben Sinclair ben at bensinclair.com

-- Met vriendelijke Groet, Simon Claessen drukknop.nl

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mspproductions＠gmail.com

4:59 p.m.

Hello, I am bypassing the dead battery using a variable bench power supply set at 6V, I have disconnected the dead hard drive. I am powering with a power book 100 series power adapter. I had disassembled the unit and when i got the logic board out you can smell electrolyte and see corrosion around the pins of some of the surface mount capacitors. The radial electrolytics will be replaced as there are only 5, those will be replaced with Panasonic FR series caps. I suspect the Axial 470 UF caps will be fine as those are Nichicon 105 degree and are quite expensive to replace with something of similar quality. But if i have to there are some Vishay ones that would fit the bill. Matt On Mon, Dec 8, 2014 at 2:43 PM, drlegendre . <drlegendre at gmail.com> wrote:

...

On Mon, Dec 8, 2014 at 10:40 AM, Simon Claessen <simski at dds.nl> wrote:

but do change the caps, and you can substitute the platter of a mac classic 40mb drive and reuse the electronics of the drive in the

portable. FYI, this didn't work for me, even though I did apparently have the 'correct' 40MB Connor HD. The electronics wouldn't transplant, or something to that effect. I ended up having to make a cable for it, which was a little messy but did work just fine.

-- Matt Patoray Owner, MSP Productions (330)542-3698 mspproductions at gmail.com KD8AMG Amateur Radio Call Sign

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richard.smith＠mewgull.com

8 Dec 8 Dec

10:55 a.m.

The internal battery is required to get the machine to boot properly. It is a 6 volt sealed lead-acid battery made up of three Cylon 2 volt 4AH cells. It's many years since I rebuilt one. Richard Smith Mewgull Associates Limited Leonard Lane Bristol BS1 1EA Office: +44 (0) 117 951 8321 Mobile: +44 (0) 7768 517284 Sent from my iPad

...

On 8 Dec 2014, at 15:49, Ben Sinclair <bensinc at gmail.com> wrote: I have a Portable as well, and that's correct about the battery. It won't boot at all, even with external power, if the battery is dead. Try doing some searching about alternative power supplies. I believe the problem is that the standard power supply can't source enough power to get things started on its own. I've read about people having success using a power supply from a PowerBook 100, or building their own power supplies.

On Mon, Dec 8, 2014 at 9:40 AM, Sean Caron <scaron at umich.edu> wrote: Don't they also act funny if the internal battery is dead? You might have to provide a substitute for that voltage. My memory is pretty fuzzy... it's been a while since I've read anything or given any mindshare to a Mac Portable. But I definitely remember they had some strange quirks in their behavior. Best, Sean

On Mon, Dec 8, 2014 at 2:13 AM, drlegendre . <drlegendre at gmail.com> wrote: If this is one of the original Mac Portables (white, wedge-shaped, B&W

LCD

screen), have you disconnected the HD from the motherboard? The HDs on these machines just love to die, and when they do, they can screw-up the whole machine. If you haven't already eliminated that possibility, I'd do it before you run around replacing anything else. If you can find the correct drive, you can make a cable to adapt it to the portable - but you won't have the low-power feature of the original

drive.

It's been 15 years, but I went through one of those machines, back when. On Sun, Dec 7, 2014 at 6:26 PM, Matt Patoray <mspproductions at gmail.com> wrote: > > Hello all, > > I have a Mac portable that refuses to even attempt to boot. > > I get random junk on the screen that is different on every power up, no > drive activity and no sound. > > I am thinking the onboard surface mount electrolytics are due for > replacement. > > I was able to read the values off of most of the caps but I was not

able >> to read the follow caps. C4, C5, C15 and C24. >> >> Does anyone know what value those caps are? >> >> Thanks, >> >> Matt >> >> Sent from my iPhone

-- Ben Sinclair ben at bensinclair.com

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