So turned out not to be the power lead from the PSU to spectrum. Having un-soldered one of the wires and testing continuity ever thing was fine. I reassembled the PSU tested it on the bench every thing was fine. Took it back in the house plugged it in setup, nothing worked. Tested the output, 1V again! After some muttering and wire wiggling nothing changed, until I knocked the PSU with my foot. 7V appeared on the meter, OK half the output very odd. Best bet was a dry joint. Out to the garage, re-soldered every thing. Tested and working now.
Well the power supply is working. The next problem was the classic membrane failure on the keyboard. I might have been able to live with it, if it wasn't a fault on the row with J on it! So opened it the speccy up again and had another look at the ribbons from the keyboard. Other than the discolouring there was a faint crack just above the connector on one side. It was worth a cheeky hack attempt, so I snipped it off just above the crack. Didnt work, actually made it damn near impossible to re-install. After several attempts I went from no keys to a few keys and back again. Seating the ribbon is a pain.
Ordered another online just under £10 including postage (UK), www.dataserve-retro.co.uk
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AuthorMe, slightly crazy engineer type. Generalist in nature, hardware or software with nonspecialist skill set. Archives
January 2020
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