Got an old HP 1215, printing is fine on some lines and shadowed on others, looks a mess and isn;t really readable. Tried new cartridge and test scan but no better - any ideas????

Calibrate the product
Calibration is a product function that optimizes print quality. If you experience any print-quality problems, calibrate the product.
1. Open HP Color LaserJet CP1210 Series Toolbox or HP ToolboxFX.
2. Click the Device Settings folder, and then click the Print Quality page.
3. In the area for Color Calibration, select the Calibrate Now check box.
4. Click Apply to calibrate the product immediately. Calibrate the product Calibration is a product function that optimizes print quality. If you experience any print-quality problems, calibrate the product. 1. Open HP Color LaserJet CP1210 Series Toolbox or HP ToolboxFX. 2. Click the Device Settings folder, and then click the Print Quality page. 3. In the area for Color Calibration, select the Calibrate Now check box. 4. Click Apply to calibrate the product immediately.

Calibrate the product
Calibration is a product function that optimizes print quality. If you experience any print-quality problems, calibrate the product.
1. Open HP Color LaserJet CP1210 Series Toolbox or HP ToolboxFX.
2. Click the Device Settings folder, and then click the Print Quality page.
3. In the area for Color Calibration, select the Calibrate Now check box.
4. Click Apply to calibrate the product immediately. Calibrate the product Calibration is a product function that optimizes print quality. If you experience any print-quality problems, calibrate the product. 1. Open HP Color LaserJet CP1210 Series Toolbox or HP ToolboxFX. 2. Click the Device Settings folder, and then click the Print Quality page. 3. In the area for Color Calibration, select the Calibrate Now check box. 4. Click Apply to calibrate the product immediately.