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NEC PC Engine/TurboGrafx-16 Games/Consoles => Console Repair/Mod Center => Topic started by: Bdoi on 05/03/2026, 02:25 PM

Title: core grafx II issue after recap
Post by: Bdoi on 05/03/2026, 02:25 PM
Hi guys,
I received my first CoreGrafx II last week, and it was working.
I opened it to check for capacitor leakage, and there was some, so I recapped everything with ceramic capacitors (except for the 470 µF one).
After the recap, I only got a solid pink/orange screen, nothing else :(
I then tried replacing the ceramic capacitors with standard electrolytic ones, but now I get no signal at all — my TV doesn't seem to recognize the console.
Since I'm not familiar with this console, does anyone have advice on where to start troubleshooting?
Thanks in advance!
Title: Re: core grafx II issue after recap
Post by: NightWolve on 05/04/2026, 03:45 PM
Hm, I don't trust ceramic capacitors as replacements for electrolytic models, it's above our pay grade... You shouldn't have done that.

I would clean the PCB thoroughly around the capacitor area, and check for trace damage. Check for corroded vias too.