symptom: didn't boot, bought blind from eBay
cause: main RAM was bad; replaced, board started up perfectly
time spent: 30 minutes; 20 fixing it, 10 selling it afterwards
having a chuckle at pearl-clutchers losing their minds that someone would buy a board that looked like an easy fix & sell
My goal was to get Splitfire out of the way so I can properly focus on this without burning myself out. I'm back on working on a version that reduces this to one cable through input multiplexing. However, the unavailability of microcontrollers due to supply chain issues makes this a little...
That depends on if the HDMI device will accept 15KHz horizontal scan rate and with composite sync over the HDMI port. In theory, it could work, but in practice I would not expect it to. The El Gato ones are famously picky as it is, as I remember.
The OSSC is a recommended prescaler. I use mine...
I've got a huge pile of boards. There was a little bit of factory fun and there is a tiny amount of manual work on my end to make them ready. The Hirose JAMMA edges need to be soldered on, as do the audio transformers.
I made a tiny component clearance mistake so I had to trim two pins off...
Comment out the "sound.a68" inclusion in "patch.a68" as this went in the direction of importing the Puyo 1 soundtrack into Puyo 2 and that's not what you need.
Cold solder joints are common. If you have an MS8-29, there are H and V hold pots on the remote board as well as on the main board. Both should be checked. If the monitor has never been pulled to do basic preventative service, then it would be wise to do that now.
Just a heads up: I wouldn't run the MS-293x tube without a neck board without some serious caution. Pin 4 - often unused on tubes of this shape and age - presents the full ~28kV through a large resistor:
When I say large, I mean that it's so high resistance that it is immeasurable with my...