You can imagine my disappointment when I plugged it into the TV and it booted up with the familiar flashing corruption on screen rather than the expected “© 1982 Sinclair Research” waiting expectedly at the bottom of the screen.
I say familiar, because I know what’s happened to this. It looks like someone has either unplugged a peripheral or somehow shorted out the expansion port on the back whilst the unit was plugged in.
But, I’m not going to let a little thing like that get in the way of repairing this perfectly fine example of 8 bit computing. There appear to be plenty of online suppliers that offer tested Z80 and ULA chips and I’m sure that I can get hold of RAM from the museum if I ask nicely enough.
There are also plenty of good repair guides on the Internet that will walk you through checking which chip is faulty with nothing more than a steady hand and a multimeter.
It’ll give me something to do during my lunchbreak at work…
- Fixing a poorly ZX-Spectrum (Part 1) – Starting to investigate the problem
- Fixing a poorly ZX-Spectrum (Part 2) – Checking the Z80 and ULA
- Fixing a poorly ZX-Spectrum (Part 3) – Checking the RAM
- Fixing a poorly ZX-Spectrum (Part 4) – Diagnosing the problem
- Fixing a poorly ZX-Spectrum (Part 5) – Isolating the faulty RAM chip
- Fixing a poorly ZX-Spectrum (Part 6) – Removing the faulty RAM chip
- Fixing a poorly ZX-Spectrum (Part 7) – Ordering the parts