printer goes to sleep and then won't wake up for a network print job, i have to turn it off and on again every time.

Diagnosis

This issue is caused by a failure in the HP OfficeJet Pro 9015e's "Deep Sleep" power state, where the printer's network interface card (NIC) enters a low-power mode and fails to respond to the "Wake-on-LAN" (WoL) magic packet sent by your computer or mobile device. Instead of transitioning from a dormant state back to an active state, the printer remains in a software loop, effectively severing the TCP/IP connection to your router. You can confirm this is the root cause if the printer remains unresponsive to network jobs but responds immediately to a physical button press on the control panel. If the printer's IP address disappears from your router's connected devices list while it is "asleep," the NIC is powering down completely rather than staying in a listening mode, which prevents the printer from acknowledging the incoming print queue.

How to Fix It

To resolve this, you must disable the aggressive power-saving features and assign a static identity to the printer on your network to prevent IP lease timeouts.

1. On the printer's home touchscreen, swipe down from the top to open the Dashboard and tap the Settings (gear icon).
2. Navigate to Preferences and then select Power Management.
3. Locate the Sleep Mode setting. If it is set to a specific time (e.g., 15 minutes), change it to the maximum available duration or "Never" if the option is present on your specific firmware version.
4. Scroll down to Auto-Off/Auto-On. Ensure that "Auto-Off" is disabled. This prevents the printer from shutting down the internal power supply entirely after a period of inactivity.
5. Exit the menu and open a web browser on your computer. Type the printer's IP Address (found under Network Summary in the printer settings) into the address bar to open the Embedded Web Server (EWS).
6. In the EWS, click the Network tab, then select IPv4 Configuration.
7. Change the IP address assignment from "Automatic/DHCP" to Manual/Static IP. Assign an IP address outside the range of your router's typical DHCP pool (e.g., if your router assigns .2 through .100, set the printer to .200) to ensure it never loses its network handshake during sleep.
8. Click Apply and restart the printer.

If That Didn't Work

• Disable IPv6: Some routers struggle to wake devices using IPv6. In the printer's EWS (Embedded Web Server) under the Network tab, find the IPv6 settings and uncheck the "Enable IPv6" box. This forces the printer to rely solely on IPv4, which is significantly more stable for Wake-on-LAN triggers.
• Update Firmware via USB: Network-delivered firmware updates can sometimes be corrupted. Download the latest firmware package from the HP support site to a USB flash drive, insert it into the printer's port, and run the update manually from the "Service" menu. This often patches "Deep Sleep" bugs that are not resolved by standard over-the-air updates.
• Change Router DNS: If the printer is "invisible" to the network, change your router's DNS settings to Google Public DNS (8.8.8.8 and 8.8.4.4). This improves the resolution of the printer's hostname, ensuring the print job reaches the correct hardware address without timing out.
• Disable Fast Startup (Windows): If you are printing from a PC, disable "Fast Startup" in the Windows Power Options. Fast Startup can sometimes send a "stale" network request that the printer ignores while in sleep mode, whereas a fresh boot sends a clean request that triggers the wake cycle.

Heads Up

• Power Source: Always plug the OfficeJet Pro 9015e directly into a wall outlet. Using a cheap power strip or surge protector can cause voltage drops that trigger an unplanned "Deep Sleep" or prevent the NIC from receiving enough power to wake up.
• HP+ Subscription: If you are using the "e" series (HP+) features, ensure your account is active. A lapsed subscription or account error can occasionally cause the printer to enter a "locked" state that mimics a sleep failure.
• Static IP Maintenance: If you change your router or reset your network, remember that your static IP may no longer be valid. You will need to re-enter the EWS to update the IP address.