Here's an example of the Электроника Б6-03 — Elektronika B6-03 Digital LCD watch. This particular model, among three others, has arrived from Ukraine. It's the first of the three I've purchased which was in good enough condition to bring back to life. The other two were "battery bombed"...
maybe try booting with no expansion RAM and the. Half of the RAM - and switch the sticks for the other half. You may need to change jumper settings to support none / half ram.
edit: I’m on mobile, about to head out so my message is a bit short -
Tonight I'm breathing life back into my recently acquired 128k
Still needs a wash and a re-cap and this bad boy will be disappointing future generations for... generations!
Here's another mod, this time with transparent 3D printing filament as a light pipe:
Originally these SNES Jr. (SNS-101) don't have an LED power indicator at all. This simple mod (with my own twist, the light pipe) tidies up what feels like a "missing" feature.
For this console I also...
If you have a logic analyzer or oscilloscope you can observe the central two pins — one is clock and the other is data. The data line will pulse high or low with the clock line.
If you're seeing a clock and data then your keyboard is fine. Could be something on the Mac side. If you're seeing...
Yup, looks like it's identical to the unit Colin from This Does Not Compute (YouTube) loaned me for my reversing (I have photos on my GitHub Repo for this project Front / Back).
Finally found why the N64 logic board - which I got a great deal on - wouldn’t start (no sound / video).
two pads (AD6 & AD9) had a break directly where the trace meets the pad. A quick bodge (once you find it) and I’m playing GoldenEye!