Generally those PS/2 modules do work in normal 286 boards. I believe the only reason PS/2 versions were sold was so that the "dingus" was shaped in such a way that it wouldn't be obstructed by anything else on the motherboard or in the case. Even on standard boards, you can have a lot of installation issues depending on where the CPU socket is located. That's why companies like Evergreen even sold rotator sockets for their upgrade products.
No CPU upgrade is 100% compatible, so just because it doesn't work at all in that particular motherboard doesn't mean it's dead. I would definitely check in another board.
But, on the other hand it is very easy to plug these upgrades in the wrong way since the socket isn't keyed. That could certainly kill it.
"Will the highways on the internets become more few?" -Gee Dubya
V'Ger XT|Upgraded AT|Ultimate 386|Super VL/EISA 486|SMP VL/EISA Pentium