Glad it works in your other machine Matt!
uniserver: The problem you're talking about is due to the thickness of the 8 MB ROM SIMM. My supplier made the 8 MB SIMMs much thinner than the 2 MB SIMMs (even though they were both ordered at the same thickness of 1.2 mm), so it has had contact problems in some sockets. The 2 MB SIMMs are thicker and never have the problem. At least some people with SE/30s have trouble with that, but I haven't heard of anybody seeing that problem in newer machines. I've been able to add solder to the contacts to fix the problem for at least one person.
Also, the 8 MB SIMM uses more traces than the 2 MB SIMM which uses more traces than the stock SIMM, so it's potentially possible that a machine could have damage on one of the higher address pins and nobody would know until they tried one of my SIMMs.
On the next batch I have made (whenever I get around to it), I'll try to make sure that the PCBs end up thicker so that particular contact issue doesn't happen. Anyway, that particular issue is totally different from the issue Matt is seeing, which is almost certainly a broken trace/pin somewhere...
uniserver: The problem you're talking about is due to the thickness of the 8 MB ROM SIMM. My supplier made the 8 MB SIMMs much thinner than the 2 MB SIMMs (even though they were both ordered at the same thickness of 1.2 mm), so it has had contact problems in some sockets. The 2 MB SIMMs are thicker and never have the problem. At least some people with SE/30s have trouble with that, but I haven't heard of anybody seeing that problem in newer machines. I've been able to add solder to the contacts to fix the problem for at least one person.
Also, the 8 MB SIMM uses more traces than the 2 MB SIMM which uses more traces than the stock SIMM, so it's potentially possible that a machine could have damage on one of the higher address pins and nobody would know until they tried one of my SIMMs.
On the next batch I have made (whenever I get around to it), I'll try to make sure that the PCBs end up thicker so that particular contact issue doesn't happen. Anyway, that particular issue is totally different from the issue Matt is seeing, which is almost certainly a broken trace/pin somewhere...