Re: Spectrum 48k power jack
The only 'hard' part on a Spectrum is the ULA chip, which may or may not be getting hard to find now.
The ribbon cables from the keyboard membrane to the connectors on the PCB may have gone brittle so they might crack and start distintegrating, but even they have been recently remanufactured and are available, as is the screen printed aluminium keyboard overlay which, unless you are very careful, tends to get buckled when you try to lever it off to replace the keyboard membrane.
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