Have a specific error code from the test program? Post your results in the comments below, and our repair team will decode it for you within 24 hours.

Chaining test programs allows multiple small tests to execute sequentially without reloading the entire cassette/disk image. Two common approaches:

When creating software for the ZX Spectrum today, the "test program" can range from a simple diagnostic tool to check your hardware to a sophisticated unit testing suite for new Z80 code. Recommended ZX Spectrum Diagnostic & Test Tools

It loads via the standard cassette port ( LOAD "" ).

A: The ZXArt and World of Spectrum archives are excellent resources. The system-software/programming/tests section on ZXArt, in particular, is a great place to start.

Happy testing, and let us know if you have any questions or need further assistance!

Visit their downloads section for specific diagnostic software tailored for motherboard revisions (Issue 2 through Issue 6A). How to Run a Test Program on a Dead Spectrum

If you have a modern SD card interface attached to your Spectrum:

: While the tools listed are generally safe, improper use of hardware diagnostics that bypass the main ROM can sometimes stress older chips. Always double-check your connections and proceed with caution.

Testing the internal beeper or the AY-3-8912 sound chip. Top ZX Spectrum Diagnostic Test Programs