Mac LC-II battery corrosion, will it ever run again?

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rubber_jonnie
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Re: Mac LC-II battery corrosion, will it ever run again?

Post by rubber_jonnie »

PhilC wrote: Tue Nov 07, 2023 2:22 pm @rubber_jonnie I was just surprised it all worked with the Blue Scsi so easily
BlueSCSI is just great when you have a genuine Blue Pill.

Once I got the genuine article mine worked right away with both the Mac Classic and A5000. It's a great solution for sure.
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Re: Mac LC-II battery corrosion, will it ever run again?

Post by PhilC »

Been having a look at the other LC and it looks like all the pins that should be connected on the 68030 now are at least mechanically, just got to check them all electronically next.

One thing I have noticed is that /BERR is low, so we have a bus error being generated by one of the chips, not sure which one yet.

I did swap the roms over with the other LC and they boot just fine in that, so one less thing to worry about now.
If it ain't broke, test it to Destruction.
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Re: Mac LC-II battery corrosion, will it ever run again?

Post by rubber_jonnie »

PhilC wrote: Tue Nov 07, 2023 9:02 pm Been having a look at the other LC and it looks like all the pins that should be connected on the 68030 now are at least mechanically, just got to check them all electronically next.

One thing I have noticed is that /BERR is low, so we have a bus error being generated by one of the chips, not sure which one yet.

I did swap the roms over with the other LC and they boot just fine in that, so one less thing to worry about now.
God I hate battery damage, it's so insidious.

Good news re the ROMs though. Damn, wishing I still had my LC 475 :(
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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Re: Mac LC-II battery corrosion, will it ever run again?

Post by PhilC »

@rubber_jonnie it certainly is. This is turning out to be an interesting project for.corrosion repair and certainly proves that you can never judge pcb corrosion just by looking at the pcb.
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Re: Mac LC-II battery corrosion, will it ever run again?

Post by rubber_jonnie »

PhilC wrote: Tue Nov 07, 2023 9:23 pm @rubber_jonnie it certainly is. This is turning out to be an interesting project for.corrosion repair and certainly proves that you can never judge pcb corrosion just by looking at the pcb.
Indeed not. My A5000 needed several ICs replacing even though they, and their traces looked fine, would have had no IDE otherwise.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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