Faded Print / Bubbles
| Laser printer print defects - Faded Print / Bubbles |  |
| Problem | Cause | Solution | How common* | Comments |
| Faded print/ bubbles | No drum ground path | With no ground path, the drum cannot discharge. The negative charge on the drum repels toner and leaves a white page with bubble print. 1. Check the drum ground spring and reconnect it, if necessary. 2. Replace the engine controller board | 8 | |
| *On a scale of 1-10, how often this problem occurs (10 being most likely). | ||||
