Recent content by Steve Rieck

And Reconnaissance pinpointed the issue (VIA chip connections) in 10 seconds. Amazing software!

that's really interesting. I've got six compact macs with Sony power supplies... when I get a chance I'm gonna go through them and see if any are demonstrating those horizontal lines. I may not have even noticed.

with multiple CRT's, analog boards and logic boards, I wonder if the Sony's are somehow having an issue with the power in your home? anything suspicious plugged in nearby? Have you tried this at a different location?

Just curious and I'm not sure this is gonna tell you that much but does it only do it with SE/30 boards? Would you happen to have a regular SE board you could test? I guess if it did it with the SE board you could definitively say this is something about how the power supply is interacting with...

sorry if I didn't read all of the above comments but did you test with another SE/30 logic board? Same results? just wondering how that particular logic board might be interacting with power supplies. If it were unique to that logic board of course that would give you something to work from.

how many Sonys do you have? And did you recap and reassemble them all yourself? The only thing I can think of is some sort of grounding issue or interference but since it's common to all the Sonys it makes me think it might have something to do with the reassembly process like not getting some...

interesting. that does seem weird. Did you test the exact voltages on the +/- 5 and 12V rails for each power supply? That might tell you something. I have three SE/30s all with Sony power supplies and not seeing that issue.

Have you recapped it? JDW has an excellent video on YouTube about recapping that particular power supply (Sony CR-44)

Whenever I widen the horizontal adjust, the top and bottom corners move out but the middle of the left and right side don't moves... like this: ) ( Is there an adjustment to counterbalance this and get them even?

I would check all points of each address and data line for continuity and also see what they're doing or not on an oscilloscope if possible. Also, definitely be sure to go through this guide systematically. Even though you're not getting a Simasimac, there's alot of good info here for...

gotcha well that tells you something. Have you checked all the address and data lines?

I got some beauties of my own lol… Yeah I would try a floppy boot OS 7 disk if you haven't yet and see if you have the same problem. If it works with the boot floppy, then the problem could logically be isolated to something in the SCSI....I think?

Potentially unpopular opinion but I like sockets on PLCC chips provided two things: 1 - They're very well installed. very clean soldering etc. 2. - You need to go in with an X-Acto kinfe under a microscope and physically pull each contact on the socket outward a bit ensuring strong contact to...

I'm confused by the bare wire laying on the SCSI chip? Maybe that has something to do with it? Will it boot a System 7 boot Floppy disk? If yes, I'd suspect something specific to SCSI.

Curious if you ever resolved this? I'm having similar issues with a reloaded board.