Can I fix an eBay spares repairs ZX81 with an AliExpress Oscilloscope?

I finally got myself a new Oscilloscope but not wanting to spend to much money I found one on AliExpress for only £40. I also recently bought a ZX81 from eBay that was sold for spares or repairs so can I use one to fix the other? Thanks to Lee from @MoreFunMakingIt for sending me the composite mod for the ZX81 along with same for the Atari 2600 and a Kung Fu cart for the C64! Make sure to go check out his channel and don’t forget to say CRG sent you :) @UC5WFTrin8VTv397vQIA8mcA CRG Twitter - CRG Patreon - CRG Discord - Music - Cathode Ray Gun by @Momentvm Chapters 00:00 Intro 01:02 First look and unboxing 04:57 PSU test 06:26 Opening the ZX81 07:13 Look around the ZX81 board 08:35 Powering up 09:55 Testing with the scope 13:06 Composite mod and thanks to @MoreFunMakingIt 19:22 What’s on the screen 19:44 M