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Stephen Usher
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Introducing the Sinclair ZX Spectrum+ Next...
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Bother! The Sinclair ZX Spectrum 128K I got from eBay has developed a fault only hours after getting it home.

The picture below (ignore blotches caused by poor TV cable) is from just after I replaced the keyboard membrane. I then left it to soak test for an hour, after which extra black pixels started appearing on the screen which changed in predictable ways when the display changed, but only in 128K mode and not 48K.

Looks like a problem in the upper RAM or RAM decode circuitry. :-(
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Well, thanks to Dave and Andy on the MTX forums the Memotech MTX512 now has a full complement of memory and CF card reader with everything but the IDE based CF card reader inside the case, as it should be.
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Happy 36th birthday Sinclair ZX81
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06/03/2017
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