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resurrecting an old thread. I have no sound from speaker on lc3 but headphone works great. I removed and cleaned sound chip and pads. Still the same. Went over David Cooks steps and found no continuity between sp1 and the speaker pins. All other steps were fine. How to find broken trace / via...

So grabbed 4 7100 boards online hoping to make a few good ones. Nope, one board works, rest turn on but no chime or anything else. Processors do not looked cracked or anything. Any idea? Or just recycle them? Recapped and rethermal pasted the working one and have it back in a machine now.

Clean the simm contacts with isopropyl. I was just having issues with my se and reseated memory and rom simms to fix my video issues

This is where the urine was so will have to go over to this area. I think there is a iisi schematic?

:) says recapped above. Thinking more a bad trace or something. Computer works flawlessly otherwise

Recapped a barn find iisi and it came back pretty good so far. It chimes, boots, passes all tests i have tried on it. Only thing is i have 3 different nubus Ethernet adapters that are known good because i have another iisi to try on. When i stick any one of them in the nubus slot on this machine...

Awesome, glad you figured it out:)

I had this issue with a lc475 and was annoying as hell to figure out. Recapped the caps closest to floppy and that fixed it. On an se/30 i am not sure what those caps would be. Also clean swim chip and areas around where caps leaked goo with isopropyl 99%

Ok, i reflowed the flyback and yoke board. Now i dont get any resolution higher than 640x480 on onboard or av card

I have an applevision 17” that was given to me. It works, but the bottom of the screen can sometimes get lines and sometimes whole screen seems to jiggle or something. Hard to capture it with video. Is a total recap and reflow of flyback and yoke board recommended? Hate to pump a lot money and...

Your replying to a post from 2014:)

I think the dc and sound board can go bad on these? I remember something about power and sound on pismos.

Yeah me too. Was definitely weird. I could see the darkness around edges when i shut it off, but when it was on it still didnt look inverted like some of the 180’s i had. Could still see the little pixel squares etc even on the side darkness.

So my unicorn 540 was good for a long long time. I turned it on and forgot for hours today that it was on. Came back, and notice it looked like a little tunnel vision starting. Weird that one little area on side but corners werent bad. I shut it off for a few hours and now looks good again but...

I recapped my 13” high res monitors a long while back as well as my lc series computers (lc, lc2, lc 3 etc) the lc 3 works perfectly with the monitor but the lc and lcii dont show anything. They work fine with my 14” apple color display in other room. Why not with the high res?

Thanks for the info. Yeah i know the fragility of the 601’s. The paste was really gone and was hard to clean off with isopropyl so maybe it ran hot for awhile before i owned it? recapping went well so cant see it being caps. I will attach a video which may or may not blow your mind. Its a...

So another 7100, another problem. This board worked before recap. I put organic polymer caps on it, and repasted cpu. I just did the same thing to a 6100/66 bought in the same purchase and it works perfectly. I have tried different psu and no difference, just dead. Any idea on this one? These...

I just recapped a 7100 i just picked up and now no signs of life. I have done a ton of macs and only ones i seem to have issues with is the 601 boards. I just did 6100 in the same pick up and it works perfectly thank god

Sounds like possibly a broken trace. How are the simm holders themselves, are the little tabs plastic / broken, or the metal ones?