The pile of five mostly broken ZX Spectrums is reduced by another one!

In this episode, I manage to track down the fault using a combination of diagnostic testing tools and an oscilloscope. Faulty ram chips can sometimes trash the system so badly it's just about impossible to track down the fault without removing components (see the next one in this series for a great example of this!).

I never claim to be an expert, and I don't want that label. It carries too much responsibility. The purpose of my channel is to share my journey. If you accidentally learn something that's all on you.

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00:00 Introduction 01:17 In We Go! 04:26 TR4 Testing BAD 05:48 First Switch on 06:00 Dandanator Diagnostics 06:45 Test ULA 07:12 Broke the ULA Socket! 08:34 Replace ULA Socket! 10:35 This Week in Retro Dave 11:53 Oscilloscoping We Go! 15:48 Removing IC19 Upper Ram 16:18 Lost a Pad! 17:23 Testing Upper Ram IC19 18:07 Removing the ROM 20:15 Lost ANOTHER Pad! 22:59 Diagnost ROM Testing 23:30 Removing IC10 Lower Ram 24:49 Testing IC10 26:49 Working Machine! Mostly... 29:42 Faulty Speaker 32:04 FINAL Testing 33:50 Goodbye!

#zxspectrum #computerrepair #sinclairzxspectrum