Dead 6100

[CelGen]

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:

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?

 

[trag]

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.

 

[CelGen]

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.

 

[Unknown_K]

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

 

[Macdrone]

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.

 

[CelGen]

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.

 

[unity]

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.

 

[Unknown_K]

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

 

[Elfen]

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.

 

[CelGen]

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.

 

[Carboy7]

Hope it works out.

 

[CelGen]

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.

 

[unity]

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.

 

[Trash80toHP_Mini]

Got feets? :?:

 

[Huxley]

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!

 

[techknight]

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. 

 

[alk]

Zombie thread...

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.

Yeah. I've heard this for decades. But in all my time with x100 Power Macs, I have never in my life seen a PDS terminator. Not in stock machines. Not for sale on aftermarket sites. Not even on eBay. And I can confirm with hands-on experience with 6100s, 7100s, and 8100s that they work just fine with nothing at all in the slot.

 

[CharlieFrown]

I used to have a 6100 with similar problem, it appeared dead. Strangely a gentle hit to the side of the case would make it work!

 

[Trash80toHP_Mini]

Zombie thread...

Yeah. I've heard this for decades. But in all my time with x100 Power Macs, I have never in my life seen a PDS terminator. Not in stock machines. Not for sale on aftermarket sites. Not even on eBay.

I love digging up Zombies. My Radius 81/110 had a terminator in its slot before the G3 infusion and there's one in the slot of the spare MoBo as well. I'll have to check the Quadra 700/7100 and the spare board for that. Haven't gotten around to doing the stealth Quadra 700/G3 upgrade yet. h34r: