HP Color LaserJet Enterprise M750

Troubleshooting. Engine test button

1. Turn the product on.
2. Use a fine-point tool, (for example a precision-slotted screwdriver with a 1 mm (0.04 in) blade width) to press the engine test button.
   NOTE:
   Access the engine test button through a hole in the rear cover.
3. An engine test page (lines in each of the print cartridge colors) prints.