Some products behave unpredictably when using off-brand toner cartridges or refilled/remanufactured ones. You may want to try using a fresh Samsung catridge too.
The only rest I'm seeing in the owner's manual is to unplug your printer at the wall. Most devices need just about a minute of time uplugged to reset. I normally would also press the power button while it's unplugged too.
I found a link for you to the ower's manual. I hope it helps you in the future. The owners manual can be downloaded here:
http://downloadcenter.samsung.com/content/UM/201312/20131227145527765/EN/english.pdf
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