![](/images/backgrounds/287029/hp-cp4520-users-manual-548682217x1.png)
NOTE: If the firmware update involves a change in the format of nonvolatile
The elapsed time for an update depends on the I/O transfer time, as well as the time that it takes for the product to reinitialize. The I/O transfer time depends on a number of things, including the speed of the host computer that is sending the update and the I/O method (parallel or network). The reinitialization time depends on the specific hardware configuration of the product, such as the number of EIO devices installed, the presence of external
Finally, any print jobs that are ahead of the RFU job in the queue are printed before the update is processed.
Use one of the methods described in this manual to update the product firmware.
Printer messages during the firmware update
The following table lists the causes and results of possible interruptions to the firmware update.
Table
Cause | Result |
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The job was cancelled from the control panel. | No update has occurred. |
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A break in the I/O stream occurred during send (for example, | No update has occurred. |
the parallel cable was removed). |
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A power cycle occurred during the RECEIVING UPGRADE | No update has occurred. |
process. |
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A power cycle occurred during the PERFORMING | No update has occurred. Resend the update through a parallel |
UPGRADE process. | port or USB connection. |
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A power cycle occurred during the INITIALIZING process. | The update has been completed. |
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|
Print jobs that are sent to the product while an update is in process do not interrupt the update.
All HP LaserJet products leave the factory with the most recent firmware version installed. If a remote firmware update fails in a Windows OS, the .RFU file must be resent. For more information, see Table
If a remote firmware update fails in a Macintosh OS, contact support from an HP Customer Care Center.
The following table lists possible reasons for the failure of a remote firmware update and the corrective action required for each situation.
Table
Reason for firmware update failure | Corrective action |
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|
The .RFU file is corrupted.
The product recognizes that the file is corrupted and rejects the update. Download the file again and send the new file to the product. Download the file from www.hp.com/go/cljcp4025_firmware or www.hp.com/go/cljcp4525_firmware.
The wrong product is contained in the .RFU file.
The product recognizes the product mismatch and rejects the update. Download the correct file and send it to the product. Download the file from www.hp.com/go/ cljcp4025_firmware or www.hp.com/go/cljcp4525_firmware.
ENWW | Remote firmware update 199 |