My mate bought a Spectrum+ off eBay recently and it didn’t work.
All we got on powering up was this
First thing I did was check the voltages. They all seemed fine so on with the next test.
The ULA was the only chip that was socketed so I quickly replaced it with a known good one. Still the same fault.
To save myself some time I thought I would desolder the Z80 CPU in order to use the Fluke 9010. Turns out the CPU was at fault and on fitting a new one we got this (bad picture, I know)
Anyway, I carried out the very simple composite mod and this is pretty much all done. Another Spectrum saved