Recent content by Mr. Macintosh

Hmm. I’ll have to check on that. Would it be in the cluster where the hybrid chip usually is?

Thanks for the reply. I tried varying the power supply down to 6.6V, and it says the battery is full at every voltage. At around 6.6-6.5V, heavy HD activity will freak the system out, but it’ll still run if I lower it from 6.8 down to 6.5 after I boot.

Hello all, It’s been quite a while since I’ve posted here, and it’s good to be back! I had a quick question for you Portable people out there: I just recently recapped a clean-looking backlit model, and it seems to be working fine off of my bench supply running at 6.8v. The problem is, lowering...

Thanks! Of all the Macs I've worked with, this one is the most temperamental. Even a 512k that has four years on this thing is easier to repair and understand. Sometimes it boots, sometimes it doesn't. The keyboard is finicky (but the Alps keys are so good!). Overall: this one's going to take a...

Yeah, I got the LA local eBay listing. I live in San Diego but the drive was worth it. It actually didn't work at first, I had to take it apart and clean the capacitor goo with alcohol and a toothbrush first. Only a temporary fix though.

Hey all, This is my first officially posted conquest. Although I've had more in the past, this one is especially cool to me. I got a EBay Local Pickup Macintosh Portable for about $5. It was missing a handle and the drive bay side of the cover, but everything else was untouched - it even came...

Oh, and also check out Apple.com for a cool homage to the 128k!

Hey guys, today is the 30th birthday of our beloved 128k Macintosh. I'd welcome you all to give a hearty "happy birthday!" In this thread and post any videos of the little guy you might have. Here's hoping for another 30 years of love for the one that started it all!

Haha thanks! I really is satisfying to finally fix something you put so much time into.

By the way here's proof :)

Great news! I was doing some bend testing to see what area I needed to resolder, when I brush the J4 connector and the screen flickers on! So I resolder the J4 connector pins and viola! It works! That little bastard was hiding in plain sight! On another note, while peeking around inside, I...

Ha! Something even weirder just happened: for some reason when I bend the analog board, the screen returns to normal! When I stop bending it (towards the side wall) it goes back to black! Any thoughts?

No, it's more of a "BNNNNNNNN" that goes continuously. I think it's coming from the actual CRT. Anyways, I just slapped the thing and I saw a flash of the "?" Screen. Also something new: when I slap the side, it sometimes restarts the computer and I get the startup bong but still no screen. Any...

Ok so I cut off the J1 connector and replaced it with another one, I resoldered the other end of the J1 connector (as well as C1) and tried turning it on. All I get now is either a loud "BUUUUU" humming noise, or a booting beep and that humming noise. The screen still doesn't turn on. What do...

Thanks for the advice! So you're saying that most compact mac's J1 connectors can just start melting over time?