HP LaserJet MFP E72525
Troubleshooting. Toner cartridge detection error
Symptom
Toner cartridge is installed, but “Not Installed” message displays.
Cause
- Toner cartridge is not properly installed.
- Toner cartridge CRUM harness is defective.
- CRUM PCA or CRUM Chip is defective.
- CRUM connection (modular connector) is defective.
- CRUM joint PCA is defective.
- Bad connection between the main board and the CRUM Joint PCA.
Troubleshooting
- Toner cartridge installation problem:
– Check if the toner cartridge is properly installed.
– If the cartridge comes out automatically, check the cartridge fixing hook.
– If the cartridge fixing hook is damaged, replace the cartridge cap or cartridge. - CRUM harness problem:
– Make sure the CRUM harness is correctly connected. Check the modular jack for damage or abnormal assembly.
– If the modular jack harness is defective, replace it with a new one. If the modular jack has moved into the toner cartridge, remove it. - CRUM PCA problem or CRUM data problem:
– Replace the toner cartridge. - CRUM connection (modular connector) installation problem:
– Open the front cover. Remove the toner cartridge.
– Make sure that the CRUM connection (modular connector) is correctly installed.
– If the modular connector is not installed correctly, open the rear cover and reinstall. - CRUM joint PCA problem:
– If the CRUM joint PCA, modular jack pin, or main board interface connector are damaged, replace the PCA (see the previous step). - Bad connection between the main board and the CRUM joint PCA,:
– Check the connection between the main board and the CRUM joint PCA. If the connection is bad, replace the harness, the CRUM joint PCA,, or the main board.