Page 13 of 32
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 21:34
by Tomswork
@rubber_jonnie
That is a good sign happy macintosh
Tom
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 22:01
by rubber_jonnie
Tomswork wrote: 15 Dec 2021 21:34
@rubber_jonnie
That is a good sign happy macintosh
Tom
There's more:
IMG_20211215_215950.jpg
Still some work to do, but it's a start. This is the mobo you sent me, so thank you very much 😁
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 22:10
by Tomswork
Excellent work they are fun machine's and its good to see it work
Tom
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 22:34
by rubber_jonnie
And in no small part due to you Tom, thanks so much for your help and the mainboard, I'm very grateful.
Seems have been down to bad connections in the main plug and the power plug for the HDD, which was making and breaking and causing the PSU to hiccup. Gave them all a clean and a tweak.
Memory module installed and working too now:
IMG_20211215_223003.jpg
I need to fit a replacement battery so need to find a cr2032 holder, sure I have one somewhere.
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 22:41
by stephen_usher
Yay! Time to diagnose the original board? ;-)
By the way, to boot off the internal ROM it's Cmd-Option-X-O or set it in the "Startup Disk"
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 22:44
by mrbombermillzy
Well done sir. :dualthumbup:
However...
rubber_jonnie wrote: 15 Dec 2021 22:34
Seems have been down to bad connections in the main plug and the power plug
Doesn't this seem to be a bit of a pattern here??
rubber_jonnie wrote: 12 Dec 2021 19:09
Well, I had a look at the Speccy today, all set for a fair session of troubleshooting.
As it turned out, the diagnosis took less than 30 minutes, it was a broken power lead just inside the strain relief of the PSU.
:shock:
Tip: Next machine you do, check the power leads first. :lol:
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 23:03
by rubber_jonnie
mrbombermillzy wrote: 15 Dec 2021 22:44
Tip: Next machine you do, check the power leads first. :lol:
To be fair, the Spectrum was just a failed pair of wires, not the connector.
Not quite the same, the Mac has a 14 pin plug internally and I had already reflowed the connections for that and all other stuff, like video and sync to the neck board too. Plus the logic board was actually, and still is, dead.
The HDD power was odd, it kept pulsing and bringing the PSU down, but as soon as I sorted the Molex plug, it started behaving.
It seems that bad connections were rife in it though, as it took me another 30 minutes to clean the memory board and SIMM connections before I got anything other than a sad Mac.
Need to give the FDD a service I think, and add a non exploding battery type!
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 23:04
by rubber_jonnie
stephen_usher wrote: 15 Dec 2021 22:41
Yay! Time to diagnose the original board? ;-)
By the way, to boot off the internal ROM it's Cmd-Option-X-O or set it in the "Startup Disk"
Cheers, will try that tomorrow :thumbup:
Re: Mac Classic - will it ever run again!!
Posted: 15 Dec 2021 23:11
by Tomswork
The floppy drive gears ⚙ for ejecting can be a pain
They turn to goo
Tom
Re: Mac Classic - will it ever run again!!
Posted: 16 Dec 2021 08:34
by rubber_jonnie
Tomswork wrote: 15 Dec 2021 23:11
The floppy drive gears ⚙ for ejecting can be a pain
They turn to goo
Tom
Yeah, I've seen a lot of that on Adrian's Digital Basement.
Annoyingly this morning I powered it on and got a checkerboard pattern, so it seems I'm not done with it yet, or it's not done with me!