6100 issues

[imactheknife]

So i have this really nice 6100. I had issues with it chiming when i first got it. After reseating the cache and rom simm it worked. Little laterl, tried again, nope, no chime. Reseat it again, works. Every time it does this. Sometimes it doesnt help either. I recapped board but still does it. Not sure if simms or simm slots damaged?? Any ideas?

 

[Phipli]

So i have this really nice 6100. I had issues with it chiming when i first got it. After reseating the cache and rom simm it worked. Little laterl, tried again, nope, no chime. Reseat it again, works. Every time it does this. Sometimes it doesnt help either. I recapped board but still does it. Not sure if simms or simm slots damaged?? Any ideas?

Does it have a good battery installed?

 

[LaPorta]

Does it have a good battery installed?

This.

 

[stepleton]

To spell it out: the 6100 will not start at all on a dead battery. Yours may be well on the way out...

 

[imactheknife]

Yes, sorry, new battery, everything. Once in awhile worked ok, then nothing, no chime. Just a flaky board. Someone over clocked this too. Now wont find scsi lol.. anyone have a spare 6100 / 66 board?

 

[Phipli]

Yes, sorry, new battery, everything. Once in awhile worked ok, then nothing, no chime. Just a flaky board. Someone over clocked this too. Now wont find scsi lol.. anyone have a spare 6100 / 66 board?

Might just need recapping. NuBus PPC are starting to need it.

 

[joshc]

OP already mentioned it's been recapped.

6100 boards are just not reliable IMO - I've had quite a few of them and they are hit and miss. I still think it's mainly down to the 601 being quite fragile and those little pins can easily come loose. If it was overclocked it may have overheated at some point.

 

[Phipli]

OP already mentioned it's been recapped.

Ah sorry, missed that.

 

[trag]

Heat sink removed and old heat sink grease cleaned from CPU and heat sink?

At this age the heat sink compound has turned to chalk. It needs to be cleaned off and replaced. Gently. The CPU is fragile and those clip based heat sinks don't do it any favors.

 

[imactheknife]

So now not getting scsi or floppy, so seems o be degrading. I reflowed some stuff and found one pin on processor touching another one, no change. Oh well, will keep farting around with it. It had a fan installed on it

 

[Phipli]

So now not getting scsi or floppy, so seems o be degrading. I reflowed some stuff and found one pin on processor touching another one, no change. Oh well, will keep farting around with it. It had a fan installed on it

Have you checked the PSU voltages?

 

[imactheknife]

Have you checked the PSU voltages?

I have to different psu and both seem fine. Will try a cpu cooler on it and see. Maybe gets to hot?

 

[Phipli]

I have to different psu and both seem fine. Will try a cpu cooler on it and see. Maybe gets to hot?

What speed is it overclocked to? Did you repaste it?

 

[imactheknife]

What speed is it overclocked to? Did you repaste it?

I pulled the little cube off and was just running it at stock cpu speed 66mhz. Not sure what it was overclocked too

 

[joshc]

Got any photos of the board / cooler? Sounds like it was an aftermarket one based on you calling it a 'cube' and the mention of a fan... a stock 6100 had neither, just a very crappy fin-style heatsink with a flat base and 4 pins that latch onto the underneath of the logicboard to keep it attached. As said before, the 601 is fragile - even just putting a heatsink back on wrong can crack the 601. And the board should never be held/picked up by the heatsink - again this can damage the 601. It was such a problem when these were released that Apple had to issue a notice with replacement logicboards about this problem.

 

[imactheknife]

Got any photos of the board / cooler? Sounds like it was an aftermarket one based on you calling it a 'cube' and the mention of a fan... a stock 6100 had neither, just a very crappy fin-style heatsink with a flat base and 4 pins that latch onto the underneath of the logicboard to keep it attached. As said before, the 601 is fragile - even just putting a heatsink back on wrong can crack the 601. And the board should never be held/picked up by the heatsink - again this can damage the 601. It was such a problem when these were released that Apple had to issue a notice with replacement logicboards about this problem.

Closer inspection looks like processor die does have a crack in it. Will post picture. Most likey the issue unfortunately

 

[macuserman]

I have a 6100 board for sale at the moment if your interested, it has worked well for me but the machine was cosmeticaly terrible so I pulled the board and PSU and scrapped it. Shoot me a PM if that is something you might want.