I have a OKI C5400 with a Vista operating system. My problem is: the print quality isn't a good through Vista as it was when I had it on my old XP system. I have the up to date driver (the only one that OKI offers for this model) I have tried many different settings within the setup dialog for the printer with no luck. The pictures I print are grainy - course, they don't print fine, it is like I'm using a low dpi printer setting. Is there any specific settings I can try, any help would be great. Thanks.
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I'm not an expert on these but I'd guess either the high voltage unit or LED laser PSU are suffering from an intermittent problem. If you're lucky it's just a loose connector - but I'll bet you've already tried re-seating every connector you can find :)