e4LaserJet Pro M15x

HP LaserJet Pro M15x error E4: Fixing communication

The HP LaserJet Pro M15x error E4 signals a breakdown in communication between the host computer and the print engine. It most frequently occurs due to corrupted data packets in the queue or a faulty USB connection. Quick re-initialization usually resolves the issue.

1 views

Common causes

  • 1Stalled print queue on the operating system.
  • 2Damaged USB cable preventing stable data transfer.
  • 3Outdated or conflicting print drivers.
  • 4Excessive data packet size for printer memory.

Solutions

Quick Diagnosis

If your printer remains unresponsive despite having paper loaded, check for E4. This code often indicates that the printer is waiting for valid data from the computer.

Step-by-Step Solution

  1. Cancel all queued jobs in your print monitor.
  2. Unplug the USB cable from the back of the device.
  3. Power down the unit for 30 seconds.
  4. Reconnect and verify the printer shows 'Ready' in the device manager.

Prevention and Maintenance

Use high-shielding USB cables to prevent data interference. Keep your drivers updated via the official support site to ensure compatibility with newer OS versions.

When to Call a Technician

If the PC does not detect the printer after trying different cables and ports, the main formatter board may have a failing communication chip.

Device Technical Data

  • Technology: Monochrome Laser.
  • Speed: 19 ppm.
  • Connectivity: USB 2.0.
  • Capacity: 150 sheets.
  • Compatible consumables: HP 44A (CF244A).
  • Recommended use: Personal home office.
  • Official drivers / firmware

Steps to follow

  1. 1

    Clear queue

    Cancel all pending print jobs in the system queue.

  2. 2

    Power reset

    Turn off the printer and disconnect it for 30 seconds.

  3. 3

    Check cable

    Use a verified working USB cable for connection.

Frequently asked questions

Error E4 usually points to a data communication fault or a stalled print job on the computer side.

Clearing the print queue in Windows/macOS and power-cycling the printer usually solves the issue.

The printer uses HP 44A (CF244A) original toner cartridges.

No, it is typically a software/driver communication glitch.

HP LaserJet Pro M15x error E4: Fixing communication | Vimazdev