Once you have your and have downloaded a .TAP file, you need to load it onto your real hardware. Here is the step-by-step process.
After combing through the archives of World of Spectrum, Sinclair Q&A forums, and modern preservation projects, the most source for diagnostic software is the "Retro Test Suite" maintained by Brendan Alford (aka "RetroBreww"). zx spectrum test program link
Access the source code and ROM images at the brendanalford/zx-diagnostics GitHub . 3. Paul Farrow’s Fruitcake Tools Once you have your and have downloaded a
and provides visual border patterns and audio beeps to identify faulty RAM chips even if the screen is unreadable. 2. Historical & Official Test Programs Sinclair Q&A forums