How to Fix HP Error 73.4 (USB Not Recognized)
📑 In This Guide
Is your HP Envy printer showing error 73.4? You are not alone. The error code 73.4 indicates usb not recognized, and it affects thousands of HP printer users worldwide. The good news is that this error is usually fixable at home without calling a technician.
In this comprehensive guide, we will walk you through 4 proven methods to fix HP error 73.4. We have organized these fixes from the simplest to the most advanced, so you can start with the easiest solution first. Most users can resolve this error in under 25 minutes.
What Is HP Error 73.4?
Error 73.4 is a common HP printer error that indicates usb not recognized. This error can appear on your printer's control panel display or as a pop-up message on your computer screen when you try to print.
When error 73.4 occurs, your printer may stop printing, flash warning lights, or display the error code. The root cause is typically related to the computer cannot recognize the printer connected via usb. Understanding what triggers this error is the first step toward fixing it.
Error 73.4 can affect various HP Envy models, both older and newer versions. If you are experiencing this error, do not worry — we have compiled all the necessary troubleshooting steps below to help you get your printer back to正常工作.
Common Causes of 73.4
This error can be triggered by several factors. Understanding the root cause helps you choose the right fix.
- The computer cannot recognize the printer connected via USB.
- Internal hardware malfunction.
Printer Models Affected by 73.4
73.4 has been reported on the following HP printer models:
| Printer Series | Models | Common? | Easy Fix? |
|---|---|---|---|
| HP Envy | 3600, 3841, 3855 | ✅ Yes | ⚠️ Varies |
Error 73.4 appears across multiple HP printer series.
4 Proven Ways to Fix 73.4
Try these methods in order. Start with the easiest and most common solutions first.
Method 1: Power Cycle
Easy ⏱ 2 minutes-
1. Turn printer off.
2. Unplug from power.
3. Wait 60 seconds.
4. Plug in and restart.
Method 2: Inspect and Fix USB Not Recognized
Easy ⏱ 5 minutes-
1. Open printer access areas.
2. Check connections.
3. Clean any visible issues.
4. Close all doors and try again.
Method 3: Update Drivers and Firmware
Medium ⏱ 10 minutes-
1. Visit HP Support website.
2. Enter your printer model.
3. Download latest drivers.
4. Install and restart.
Method 4: Factory Reset
Medium ⏱ 5 minutes-
1. Navigate to Setup menu.
2. Select Factory Reset.
3. Confirm and wait for restart.
If none of the methods resolve error 73.4, it is time to call HP customer service. Have your printer model and serial number ready.
Frequently Asked Questions (FAQs)
HP error 73.4 relates to usb not recognized. The computer cannot recognize the printer connected via USB.
Follow the step-by-step methods in this guide starting with power cycling.
Check your warranty status. Hardware errors are typically covered.
Most cases are resolved within 15-20 minutes using the methods above.
Not usually. Most users can fix this at home.
Conclusion
HP error 73.4 can be frustrating, but as you have seen, there are 4 effective ways to resolve it. In most cases, starting with a simple power cycle or checking your cartridges will solve the problem quickly.
If you have tried all the methods above and the error 73.4 persists, it may be time to contact HP support for professional assistance. Remember to keep your printer's firmware updated and use genuine supplies to prevent future errors.
Remember: power cycle first, check connections second, and update firmware third. Error 73.4 can be resolved step by step.