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Mac 128k Sad Mac Error Help (newbie) [message #293021] Mon, 22 June 2015 23:50 Go to next message
Dan T. is currently offline  Dan T.
Messages: 1
Registered: June 2015
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Junior Member
Hey guys! Thanks for this group, I think its really going to help me.

I purchased a Mac 128k from eBay with an Sad Mac error code. At boot, it
shows "02FFFF" with a little graphic (a line of bits?) moving across the
bottom of the error code. My googling shows that it should be a memory chip
that is broken but since it's giving no subcode I have no idea which chip
is bad. Is there a way to find which one is messed up or is it hopeless?

I have let it sit for awhile and the bits did not go away.

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Re: Mac 128k Sad Mac Error Help (newbie) [message #293022 is a reply to message #293021] Tue, 23 June 2015 00:21 Go to previous messageGo to next message
Notgoing Totellyou is currently offline  Notgoing Totellyou
Messages: 284
Registered: December 2012
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Senior Member
sounds to me like it needs 16 chips of fresh new memory, and she will be good as new!
Charles



Sent from the office of MacCaps.com

MACCAPS.COM 
22222 ROETHEL DRIVE
SUITE F
NOVI, MICHIGAN 48375
UNITED STATES

Thanks.
Charles Phillips
248 325 8812




On Jun 22, 2015, at 11:50 PM, Dan T. wrote:

> Hey guys! Thanks for this group, I think its really going to help me.
>
> I purchased a Mac 128k from eBay with an Sad Mac error code. At boot, it shows "02FFFF" with a little graphic (a line of bits?) moving across the bottom of the error code. My googling shows that it should be a memory chip that is broken but since it's giving no subcode I have no idea which chip is bad. Is there a way to find which one is messed up or is it hopeless?
>
> I have let it sit for awhile and the bits did not go away.
>
> --
> --
> -----
> 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/
> ---
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Re: Mac 128k Sad Mac Error Help (newbie) [message #342359 is a reply to message #293021] Sun, 18 June 2017 09:00 Go to previous messageGo to next message
Scott Shingle is currently offline  Scott Shingle
Messages: 3
Registered: June 2017
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Junior Member
If there are multiple sticks of memory in the machine, try removing all but
one. Boot it up and see if you get an error. Then shut it down, stick the
next chip in, rinse and repeat until you get the error. Hopefully, you'll
have enough play on the connecting wires that you don't have to keep
pulling the logic board in and out each time. Not sure of the layout of the
Mac 128k, but if it's like the SE, the stupid logic board power connector
is 90 degrees from the 'hat' (or whatever it's called) on the CRT. Word of
advice, be careful when initially unclipping the power cable from the logic
board. I managed to crack my CRT because when the cable did come free on my
SE, my hand jerked up, hit the 'hat' and cracked the end of the CRT. Then
it was off to Ebay to find another CRT (was about as much as the whole
computer was when I bought it). Since then, I've been A LOT more careful
when removing that cable.

It could also be that one of the chips is simply a bit loose and just needs
to be reseated. Again, just pop them out (watch some vids on exactly how
it's done - usually just some spring loaded release bars) and put them back
in. Be careful though as over the years, the plastic on the release bars
has probably become quite brittle so too much pressure may break off the
plastic. The memory will still click into place, but it'll be hard to get
it out each time with nothing to easily grab onto.

Hope this helps.

On Monday, June 22, 2015 at 11:57:24 PM UTC-4, Dan T. wrote:
>
> Hey guys! Thanks for this group, I think its really going to help me.
>
> I purchased a Mac 128k from eBay with an Sad Mac error code. At boot, it
> shows "02FFFF" with a little graphic (a line of bits?) moving across the
> bottom of the error code. My googling shows that it should be a memory chip
> that is broken but since it's giving no subcode I have no idea which chip
> is bad. Is there a way to find which one is messed up or is it hopeless?
>
> I have let it sit for awhile and the bits did not go away.
>

--
--
-----
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/
---
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To unsubscribe from this group and stop receiving emails from it, send an email to vintage-macs+unsubscribe@googlegroups.com.
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Re: Mac 128k Sad Mac Error Help (newbie) [message #342361 is a reply to message #342359] Sun, 18 June 2017 11:25 Go to previous message
Clark Martin is currently offline  Clark Martin
Messages: 156
Registered: August 2012
Karma: 0
Senior Member
Memory on the Mac 128K and 512Ks are soldered to the motherboard.

It’s possible there is one or more cold solder joints associated with the memory (on a memory chip or in the memory control logic). More likely one of the chips has failed. You could try replacing all the memory, if you can still find the memory chips.

Clark Martin
A designated driver on the information Super Highway

> On Jun 18, 2017, at 6:00 AM, Scott Shingle <raydeen@gmail.com> wrote:
>
> If there are multiple sticks of memory in the machine, try removing all but one. Boot it up and see if you get an error. Then shut it down, stick the next chip in, rinse and repeat until you get the error. Hopefully, you'll have enough play on the connecting wires that you don't have to keep pulling the logic board in and out each time. Not sure of the layout of the Mac 128k, but if it's like the SE, the stupid logic board power connector is 90 degrees from the 'hat' (or whatever it's called) on the CRT. Word of advice, be careful when initially unclipping the power cable from the logic board. I managed to crack my CRT because when the cable did come free on my SE, my hand jerked up, hit the 'hat' and cracked the end of the CRT. Then it was off to Ebay to find another CRT (was about as much as the whole computer was when I bought it). Since then, I've been A LOT more careful when removing that cable.
>
> It could also be that one of the chips is simply a bit loose and just needs to be reseated. Again, just pop them out (watch some vids on exactly how it's done - usually just some spring loaded release bars) and put them back in. Be careful though as over the years, the plastic on the release bars has probably become quite brittle so too much pressure may break off the plastic. The memory will still click into place, but it'll be hard to get it out each time with nothing to easily grab onto.
>
> Hope this helps.
>
> On Monday, June 22, 2015 at 11:57:24 PM UTC-4, Dan T. wrote:
> Hey guys! Thanks for this group, I think its really going to help me.
>
> I purchased a Mac 128k from eBay with an Sad Mac error code. At boot, it shows "02FFFF" with a little graphic (a line of bits?) moving across the bottom of the error code. My googling shows that it should be a memory chip that is broken but since it's giving no subcode I have no idea which chip is bad. Is there a way to find which one is messed up or is it hopeless?
>
> I have let it sit for awhile and the bits did not go away.

--
--
-----
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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