Think you may need to be a little clearer with your question to get any sensible answer. If you ar referring to the toner light flashing then you simply need to buy a new toner and replace it.
Taz
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ml2510 red and green lites blinking alternately fast. cannot stop it. no print jobs in que. shut...
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ml2510 red and green lites blinking alternately fast. cannot stop it. no print jobs in que. shut off/on does nothing. help