15 min repair: llämp. Power transistors were fine, so were the diodes and the driver transistor. In the end it was a broken primary on the output transformer, luckily right at the connection.
Three out of three dead octek boards with Headland chipset. Although I think on this it's a mechanical issue. It broke after handling it to try the 287.
It hangs after step 04
Source: http://mrbios.com/techsupport/award/postcodes.htm
Source: http://mrbios.com/techsupport/award/postcodes.htm
I've already replaced a bunch of 74F244 buffers and 74F245 bi-directional bus transcievers because they had wonky looking outputs or even inputs
For example, this 244. The inputs looked like this, they were fed by the chipset part next to it, but also branched off to the 373 octal D flip flop above it.