Spent quite a while on a unit, repairing broken parts and trying to get it in order. Lastly, I keep getting a black streak down the right side of the page, and little or no printing on the left side. Have already replaced fuser, rollers, high voltage power supply, swapped print heads from another unit, used new toner cartridge. What else is causing this? Can it be mechanical where the toner is being opened improperly? Any thoughts appreciated.
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