Uploaded February 2021 | Updated September 2026, 3 weeks ago

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I'm troubleshooting and repairing a grey Sinclair ZX Spectrum +2 that displays a garbage screen. // Kindly sponsored by PCBWay - Get your first PCBs free! - pcbway.com

Keysight DSOX1204G Oscilloscope:
keysight.com/de/pdx-2969966-pn-DSOX1204G/oscilloscope-70-100-200-mhz-4-analog-channels

TL866 EPROM Programmer*:
US: amzn.to/3b8OmNQ
UK: amzn.to/3deVM52
DE: amzn.to/3rWXAUq

ZX Spectrum Diagnostics:
github.com/brendanalford/zx-diagnostics/wiki

DivMMC Future:
thefuturewas8bit.com/shop/sinclair/divmmcfuture.html

Desoldering Station ZD-915*:
DE: amzn.to/3jPh8qC
UK: amzn.to/3rU7WnL

Hot Air Station 858D*:
US: amzn.to/2NuWzUh
UK: amzn.to/2N6vjMe
DE: amzn.to/2OFFpUP

Jonard Tools EX-2 IC Extractor*:
US: amzn.to/3baJS9q

78S05 Voltage Regulators*:
UK: amzn.to/2NrI4AK
DE: amzn.to/3psxgjm

* Stuff marked with "*" contains affiliate links. You don't pay anything extra and I get a little commission from everything you buy through the links (even if you buy something different there).

TIME STAMPS:
0:00 Introduction
0:45 Sponsor Message
1:20 Disassembly
4:19 Replacing the voltage regulator
6:12 Tapping into the composite signal
8:04 Initial Testing
9:21 Testing Reset
10:11 Investigating faulty RAM
14:14 Replacing first RAM chip
15:37 RAM Troubleshooting with Diagnostic ROM
19:10 Running full Diagnostics
25:09 Testing with original ROM
26:42 Thank you & Goodnight

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MUSIC by FOCUS 10 focus10music.bandcamp.com

EQUIPMENT AND TOOLS I USE: kit.co/janbeta *
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Thanks for watching!

This video was sponsored by PCBWay.

My Oscilloscope was kindly provided by Keysight.

#JanBeta #Sinclair #ZXSpectrum #PCBWay