I had set my Compaq portable up on the table in preference to the Macintosh, with an idea to use it more regularly. It started up okay but made a rather unpleasant burned smell after about twenty minutes so apart it came.
Nothing particular showing up, so lifted all the expansion cards out and then removed the motherboard.
There’s a couple tantalum capacitors with cracks in, so they’ve gassed up and are not long for this world. The video output has been a little wobbly since I got the machine, particularly in low resolution mode. It’s all packed in fairly tightly.
So, out came the VDU. Picture tubes always look so forlorn when they don’t have any cases or bezels fitted.
There’s always one part that makes a bid for freedom. Tonight’s candidate was this washer:
The power supply is all plugs, making a note of what goes where as there are quite a lot of them..
Everything all lifted out quite easily.
These are the two boards that need the most attention. The power supply (the highest power most compact board designed to date at that time) and the video board, powered by the power supply on the 12V rail.
The connector was showing signs of high current draw so it’s definitely time for a rebuild. The power supply is marked “upgrade” on the back, so that’s positive.