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@This Does Not Compute The only time I have ever had my screen stay black, hearing all the sounds you described AND booting too, is when I've got the CPU overclocked too fast for the VRAM SIMM. But I am using an LC575 board, and it seems you are using the stock CCII board, right? In other...

Because I am preparing a video on this topic, I have re-read this entire thread a couple times, and I'd like to address some loose ends... @YMK Very sorry to trouble you, but could you please mark on an analog board photo where that "horizontal output transistor" is located? I'm just curious...

I have a BlueSCSI v1 mounted directly to the motherboard SCSI connector via the nifty SCSI Rider Type-A by @Kay K.M.Mods . What I love about SCSI Rider Type-A is it doesn't block anything! Putting a BSv1 or BSv2 on a 3D printed mount at the back of the slot on the SE or SE/30 creates issues on...

JLC3DP has finished printing my order and they sent me the photos below showing the knob printed twice in PA12-CF because we have 2 sizes of the inner hole. JLC asked if I was satisfied with the way their "supports" were removed and left some residual plastic behind. I told them yes and to...

Be it a paint program or a calculator, I think everything you're working on right now is an incredible feat! Truly fantastic!

The 2 datasheets you mention are here... CNY75: https://www.vishay.com/docs/83536/83536.pdf CNY17: https://www.vishay.com/docs/83606/cny17.pdf Both are drop-in compatible and typically require about 10mA to fully switch the transistor. CNY17 is a slightly better part overall but I don't see...

So basically you're working on a revamped version of SketchPad of sorts, at least on a concept level when it comes to implementing a bitmapped paint program on the LISA. Neat!

Excellent work so far on your LisaGUI, @andrew ! Because I will never own a LISA I, a personal goal for me is to be able to at least emulate the experience, which of course includes the LISA Office System software. I never had success with LisaEm running on any of my Macs, but it is...

Shooting the LCD is hard to avoid discoloration, but I found the best still images came from 4K video, and the still below is one of those. If you expand it out and zoom in, you can even see the R, G and B colors for each pixel. Super sharp!

Even without burn marks on the PCB, some of the components I listed get shockingly hot. Heat can cause many unexplainable things. And right now, you are seeing unexplainable things. I mentioned my thermal camera earlier in this thread, but it's not clear if you have one or not. If not, how...

Returning to an earlier discussing in this thread... "That thread" of course means this one: https://tinkerdifferent.com/threads/color-classic-analog-board-trouble.2367/page-2#post-21650 I'm actually prepping a new video about swapping those components, which are these: RL62: 47Ω 5W 5% Axial...

For now, I'm content to fiddly with this browser-based LISA: https://alpha.lisagui.com/ No way to set the speed to simulate that slow 5MHz processor though. But maybe that's a good thing. Even so, the major apps you'd want to try out like LISA Paint and the office suite are not available...

Not to diminish in any way the extreme importance of having a CLEAR FAN inside a crystal clear SE Case, but I know from experience that clear fan is much louder than a Noctua 60mm. It's on part with the stock fan. I love the clearness and LED light, but my ears can't handle the sound levels...

My email worked. Julia wrote back just now to say they lifted the "payment restriction" that was in place, which allowed me to pay. My order is now locked into their queue. So it's clear you do need to email them when they prevent you from paying.

Well, Julia from JLC just emailed me, and I sent her yet another reply. Hopefully, I repeated myself enough times that they realize they need to accept payment from me and lock my order into their Queue!

@This Does Not Compute Thank you for confirming, and for providing your complete cart too! The resistors and diodes in your Cart match the list I posted back in 2023.

And here's another crazy thing about JLC... Every single time I checkmark "Remember me." But guess what? It never does! I have to sign in multiple times per day, in the same browser (SafarI), on the same Mac. And yes, I've tried it on other Macs too. Not only that, but that sign-in box...

OK, but immediately after replacing those 5 components (only 5 because you used 1 diode instead of 2 for DL21/22), did your CRT content remain exactly the same as before, or did you need to make adjustments?

Apparently not. They email you to say you must wait until midnight China time and then try to make your payment as quickly as possible to ensure your order is then locked into the order queue. Crazy stuff. So after waiting for the second time until 1 AM Japan time last night to do you just...

More bad news with JLC. This is the 2nd night in a row I've stayed up to 1:00am only to see they still are refusing to accept my payment, saying their printing capacity is maxed out. :(