Recent content by reallyrandy

Hi all, I'm restoring a 128k with a Levco Monster Mac board in it. I cleaned everything up, serviced the floppy, and replaced a burnt plug on the analog board, along with a burnt Rifa cap. Everything seems to work but I'm getting these weird staticky artifacts on the screen. Has anyone seen...

Thanks, silicone or hot glue is a much better idea

Trying to figure out the best way to fix this. Any advice? Maybe superglue it down before soldering from the back? And what's up with the resistor attached to the capacitor? I'm gonna recap anyway if I can fix the janky connector but I thought it was kinda weird.

I'm restoring a couple iMac Indigos and when I installed Mech Warrior 2 on the first one my speakers blew out. I figured well they are 25 years old. On my second one, I checked the speakers with a bunch of games and they were fine, and when I booted up Mech Warrior 2 my speakers blew out again...

After recap all is well.

I have a Quantum ProDrive 250MB in one of my Mac IIcis and I want to hook up the LED activity light. Does anyone know if this (J2) is the LED terminal? Also, what is this connector type called? I did some searching but I don't know the name of the connector to buy for the LED connection.

I have a Mac II with an upgraded PMMU and 20MBs of RAM. I pulled it out of my display cabinet to replace the soldered on batteries with a battery holder and noticed a resistor soldered in the J2 position. Does anyone know what that's for? Here's some pics:

I'll have to recap it first I guess. I hesitated because I just recapped my other one and it still gets no chime and a black screen. LCs are a pain to recap, lot's of caps and some are in really tight spots, like C10.

Spoke too soon. That wasn't it. After replacing it, I tested every trace coming off the U10 chip and have continuity on all of them. Still no chime and black screen.

I think I found the problem. After removing the chip everything looked fine untill I cleaned it up and tried to put new solder on the pads. One of the pads just stuck to the iron. It had to have been loose or detached. I'm sure I didn't pull it up. I opened up the corresponding via so I can run...

That's what I suspected but figured I'd ask around first.

I pulled out a spare LCII board I had to see if it worked and it chimes and boots fine but it squeals from the speaker. When I push and pull on the speaker connector the pitch goes up and down. Attached is a video. Any ideas?

The egret is U10, right?

I have 2 LCIIs I'm working on. One is not recapped and boots fine, the other one was leaking so I didn't try to boot it before recapping. After cleaning the board and recapping and cleaning again, I get no chime and black screen. The fan runs and I can hear the hard drive working. I swapped in...

Ah, OK I'll try that. I think I can add more than 4MB if I do it via RAM disk as well. Since I'm using a SillyTinySCSI it should be fast enough.