Classic ZX Spectrum Repair – More Broken Than Expected

ZX Spectrum Repair – No Sound, Faulty DRAM, and a Bad Capacitor In this episode of More Fun Fixing It, I take on a ZX Spectrum 48K (Issue 3) with several issues: no sound, corrupted video output, and suspected RAM faults. What’s covered in this video: Investigating and fixing the missing audio Tracing colour issues back to a fault in the video circuitry (TR8) Identifying and replacing a failed ceramic capacitor Swapping out a faulty upper RAM chip at IC17 Running diagnostics to confirm the repair This Spectrum needed a bit of everything—logic probing, component swapping, and some trial and error. But by the end, it’s back up and running with clean video and working sound. This repair is part of the ongoing restoration series on the channel, focusing on bringing vintage systems back to life. If you’ve worked on a similar repair or have a Spectrum with issues, feel free to share your experience in the comments.

This episode is sponsored by the lovely PCBWay!