Uploaded June 2026 | Updated September 2026, 2 weeks ago

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Stepping outside my usual 8-bit and 16-bit microcomputers to diagnose a broken NEC PC Engine.

Special thanks to PCBWay for sponsoring this video. pcbway.com

I start by checking the power and voltage regulators before moving on to reflow the ribbon cable connections. After testing a few capacitors out of circuit, I use an oscilloscope to probe the RAM and data bus, working through the schematics to isolate the fault. The process ultimately points to a bad CPU, which unfortunately halts this specific repair.



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If you'd like to help keep the lights on (and the tools plugged in),
my Patreon is the best way to do it. Patrons get ad-free early access
to videos, behind-the-scenes updates, and entry to a super secret
Discord channel — plus my sincere gratitude, which is worth roughly
what you'd expect.

▸ Patreon: patreon.com/c/morefunmakingit

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I also have another channel called More Fun Making It, where I build
things from scratch instead of trying to coax life back into them.
Same shed, different end of the workbench.

▸ More Fun Making It: youtube.com/@MoreFunRetro

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There's also the Retro Hardware Discord, where people who enjoy this
sort of thing gather to talk about it. It's better than it has any
right to be.

▸ Retro Hardware Discord: discord.gg/ChH726tbbF

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#PCEngine #RetroRepair #ConsoleRepair