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Dead 6100


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#1 CelGen

CelGen
  • 68000
  • LocationKamloops, Canada

Posted 19 November 2016 - 03:58 AM

Unrelated to the PSU issues.

 

So I have never seen my 6100 working. Here's where I have the machine after stripping it to basics:

 

-Good PSU

-Recapped logic board

-New PRAM battery

-No ram in the slots (onboard ram only)

-ROM in slot closest to PDS

 

You turn the machine on and nothing. The CPU gets toasty after a while but otherwise there is no chime or any signs of life besides the PSU fan and the front LED.

I've heard of this once before. Someone had a machine similar in spec to mine and was a little to eccentric installing the DOS PDS board. The cable dressing between the board and the heatsink of the 601 has to be done properly or else when you press the card in you force down on the CPU and crack it. I took my heatsink off:

 

IMG_6390.jpg

 

I mean, it could be a weird ripple in how the epoxy set when the chip was fabbed. The obvious signs of the chip being broken in two are not there. One side of the of the chip isn't sitting higher or lower than the other and under a loupe I can't see something like a hairline crack.

If the chip is cracked the board is trash. What other things on the board could I of missed in case we are not looking at a bad CPU?


Edited by CelGen, 19 November 2016 - 04:05 AM.


#2 trag

trag
  • 68020
  • LocationAustin, TX

Posted 19 November 2016 - 06:45 AM

Have you tested with something in the PDS slot? According to Apple the PDS slot must be terminated. Machines without one of the video options, nor the DOS card shipped with a simple terminating card in the PDS slot.

Also, you might try the ROM in a different slot. The ROM and cache slots are interchangeable.

#3 CelGen

CelGen
  • 68000
  • LocationKamloops, Canada

Posted 19 November 2016 - 06:05 PM

Have you tested with something in the PDS slot? According to Apple the PDS slot must be terminated.

Tested with both the DOS card installed or the G3 adapter and nothing.

 

Also, you might try the ROM in a different slot. The ROM and cache slots are interchangeable.

No difference.



#4 Unknown_K

Unknown_K
  • 68LC040
  • LocationOhio/USA

Posted 19 November 2016 - 07:05 PM

Is it my eyes, or are some of the CPU pins on the bottom bridged?


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#5 Macdrone

Macdrone
  • 68020
  • LocationKelso, Wa

Posted 19 November 2016 - 08:33 PM

did you remove the battery and try the power supply "double tap"?  the 6100 is known to be bad about startup with a dead battery.  You must turn on off then on real quick to make it boot.  Also is the rom simm/dimm present?  Can be in either of the 2 slots.


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#6 CelGen

CelGen
  • 68000
  • LocationKamloops, Canada

Posted 19 November 2016 - 09:27 PM

Is it my eyes, or are some of the CPU pins on the bottom bridged?

It's your eyes.

 

Again, it's a good battery so the machine should not need the double-tap and as mentioned above, more than once, I have the ROM DIMM.



#7 unity

unity
  • 68020
  • LocationGreen Bay, WI

Posted 19 November 2016 - 09:28 PM

Is it my eyes, or are some of the CPU pins on the bottom bridged?

 

 

This, was going to comment the same. They look bent up possibly too.

As for the chip. TO be 100 sure its not a crack, take a perfect straight edge and bright light to make sure its flat. Something like a credit card you can cut down. A nice hard, straight edge. Stand upright and light the other side to see if it leaks through near the "crack". I have NOS 601 chips and none have that ripple. But I suppose it could be the epoxy.


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#8 Unknown_K

Unknown_K
  • 68LC040
  • LocationOhio/USA

Posted 20 November 2016 - 04:21 AM

I think I have a dead Daystar 601 upgrade for 040 PDS that looks like it has that crack.


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#9 Elfen

Elfen
  • 68030
  • LocationNYC, NY

Posted 23 November 2016 - 04:19 AM

That CPU's cracked. I've seen this in PIII/PIV PCs, and when the CPU is socketed, replace the CPU, and BAM! It's Alive!

 

Thing is, getting a "new" 601. There are a few members that can replace it as they do SMD/SMT Soldering. You need to ask the experts, most of you know who they are. Not me! I do not own a SMD/SMT Soldering station.


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#10 CelGen

CelGen
  • 68000
  • LocationKamloops, Canada

Posted 24 November 2016 - 12:53 AM

Well butts! Oh well, this machine was already in fairly poor shape with all four feet missing and a broken latch.

 

I've ordered a "new" 6100 from The Hackery. It should be ready for pickup next time I am in Vancouver.


Edited by CelGen, 24 November 2016 - 12:54 AM.


#11 Carboy7

Carboy7
  • 6502
  • LocationDurham, North Carolina, USA

Posted 24 November 2016 - 05:34 AM

Hope it works out. :)


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#12 CelGen

CelGen
  • 68000
  • LocationKamloops, Canada

Posted 05 December 2016 - 03:43 AM

The machine was taken to The Hackery where under a microscope it was verified that indeed the chip was cracked. As mentioned they had a new machine waiting for me to pickup and it runs perfectly fine and is in excellent condition.

 

IMG_6613.jpg



#13 unity

unity
  • 68020
  • LocationGreen Bay, WI

Posted 05 December 2016 - 04:51 AM

Good to hear! I have much love for the 6100/66. Was the first PowerPC I used back in high school. LOTS of Marathon and WarCraft played on those things via appletalk.


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#14 Trash80toHP_Mini

Trash80toHP_Mini

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  • 68040
  • LocationBermuda Triangle, NC, USA

Posted 13 December 2016 - 02:31 AM

Got feets? :?:


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#15 Huxley

Huxley
  • 6502
  • LocationSan Francisco, CA, USA

Posted 02 January 2017 - 07:12 AM

Nothing of value to contribute here, other than just chiming in to say that I too used a 6100/66 for a while in my youth - if memory serves, it was the first color-capable Mac I used for dialup internet access, after my SE/30. A really nice low-profile desktop, and I'd love to stumble across one again just for nostalgia. Good luck getting your non-cracked-CPU edition setup and humming along!


Before the "Great Crash of '07", I was SpaceBoy on these forums.

#16 techknight

techknight
  • 68LC040

Posted 02 January 2017 - 08:13 PM

the 6100 was my first PowerPC I ever owned, thats for sure. Had the apple MultipleScan 15 with it. I eventually outgrew the 6100 as IE 5.5 I think it was, was a DOG on that machine... 

 

I ended up going with like a 6360 or something, I cant remember. Not much better, but I did outgrow the 6100. the 6360 got replaced with a 7200/120 and then eventually a Beige G3 in roughly 2001ish. 


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