Modern office equipment has long ceased to be a bulky device that requires a mandatory wired connection to a computer. Model HP Deskjet 3639 The MFP is a classic example of how a compact MFP can become a fully-fledged node in a home network. The ability to print documents and photos directly from a smartphone makes this gadget incredibly convenient for everyday use. However, initial setup often presents difficulties for users unfamiliar with the nuances of network protocols.
Integrating the device into the local network takes only a few minutes if you follow the steps carefully. The key here is to properly activate the wireless module on the printer itself before the mobile phone starts searching for it. It's important to understand that HP Deskjet 3639 There's no touchscreen for password entry, so all operations are performed using key combinations or a mobile app. In this article, we'll walk you through each step in detail to avoid any errors.
Before beginning software configuration, you need to physically prepare the equipment. Make sure the cartridges are installed and the paper is loaded in the tray. Without this basic setup, the device may not enter configuration-ready mode. Also, check that your router is broadcasting at a 2.4 GHz frequency, as this model does not support the 5 GHz standard, which is a common cause of connection failures.
Preparing equipment and checking the network
The first step is to ensure a stable signal and check the router's compatibility. Printer HP Deskjet 3639 Works exclusively in the 2.4 GHz band. If your router broadcasts a network with the same name (SSID) for both 2.4 and 5 GHz frequencies, conflicts may occur. In this case, we recommend temporarily separating the networks in the router settings or using a guest network with forced band selection.
Place the MFP no more than 3-4 meters from the signal source during setup. Walls and household appliances can significantly attenuate radio waves. After plugging the device into a power outlet, wait until the warm-up cycle completes. The power indicator should be solid and the wireless button should blink, indicating that it is searching for a network or is not connected.
⚠️ Important: If the wireless indicator is solid blue, the printer is already connected to a network. In this case, reset the network settings by simultaneously holding down the wireless button and the cancel button (X) for 3 seconds until the power and wireless indicators begin flashing.
Make sure your smartphone is connected to the same Wi-Fi network you plan to connect the printer to. Using mobile data (4G/5G) during setup is not possible. For the discovery protocol to work correctly, both devices must be on the same local network segment.
Activating the setup mode on the printer
There are two main ways to translate HP Deskjet 3639 Pairing mode. The first method is suitable if the device has not been previously set up or has been reset. In this case, setup mode is activated automatically upon first power-on. The wireless indicator will begin flashing blue, indicating it's ready to search.
The second method requires manual intervention via the control panel. Press and hold the wireless button on the device's panel for 3 seconds. The indicator light will begin flashing. Alternatively, press the wireless and information buttons (the "i" icon) simultaneously. This will print a network status report page, which will show the current settings and IP address.
- 📶 Hold the Wi-Fi button for 3 seconds until the indicator starts flashing.
- ℹ️ Tap Wi-Fi + Information to print a connection report.
- 🔄 Use the Wi-Fi + Cancel combination to completely reset the network.
- 🔌 Make sure the device is plugged directly into a power outlet, without any surge protectors or other low-quality stabilizers.
Once this mode is activated, you have approximately two minutes to complete setup from your phone. If a connection isn't established within this time, the printer will exit discovery mode, and the process will have to be repeated. This is done for security purposes, preventing unauthorized devices from taking control of your equipment.
Installation via the HP Smart app
The most reliable and functional way to control is to use the official application HP SmartIt's available for Android and iOS operating systems. The app automatically detects new devices on the network and offers a step-by-step setup wizard. Download the app from Google Play or the App Store and create an HP account if you don't already have one.
Launch the app and tap the plus sign (+) or the "Add Printer" button. The system will ask for permission to use geolocation. Geolocation This permission is necessary for proper scanning of available Wi-Fi networks on Android devices. Without this permission, the app will not be able to transfer the router password to the printer.
| Setup stage | User action | Indicator reaction |
|---|---|---|
| Search | Click "Add Printer" | Flashing blue |
| Conjugation | Entering the Wi-Fi password | Blinks faster |
| Confirmation | Waiting for completion | It glows steadily blue. |
| Error | Try again | It's glowing orange |
Follow the instructions on your smartphone screen. Once the app finds your HP Deskjet 3639, it will ask you to confirm the model and enter the Wi-Fi network password. The app will automatically transfer this data to the printer. During this process, do not switch between windows or lock your phone screen to avoid interrupting the data transfer.
☑️ Checklist for a successful installation
Setup via Wi-Fi Direct
If connecting via a router is impossible or the network is temporarily unavailable, you can use the technology Wi-Fi DirectIt allows you to create a direct wireless connection between your phone and printer without a router. This is ideal for quickly printing photos when visiting someone or when there's no internet connection.
To activate the mode, press the Wi-Fi Direct button on the printer panel or hold the wireless button until the Wi-Fi Direct indicator (usually a smartphone icon next to the antenna) lights up. The device will print a page with the network name and password for connecting. The network name usually includes the word "Direct" and the device model.
⚠️ Note: When using Wi-Fi Direct, your phone may temporarily lose internet access as it switches to a direct connection to the printer. This is normal behavior for this technology.
On your phone, open Wi-Fi settings, find the network with the same name as your printer, and enter the password printed on the report page. Once connected, you can print documents. To get back online, simply turn off Wi-Fi on your phone or select a different network if your smartphone supports dual Wi-Fi.
How to change Wi-Fi Direct password?
You can change the password via the Embedded Web Server (EWS). Enter the printer's IP address in your browser, go to Network -> Wi-Fi Direct -> Settings, and set a new 8-character password.
Troubleshooting connection issues
A common issue is when the phone sees the printer, but the connection fails. This may be due to router security settings. Check if AP Isolation is enabled in the router settings. This feature prevents devices within the network from communicating with each other, which blocks printing.
Another cause is a static IP address or address conflict. In most cases, the router automatically assigns addresses via DHCP, but if there are many devices on the network, the address pool may be exhausted. Try rebooting the router to refresh the list of leased addresses. Also, make sure your phone doesn't have the "Metro-sized connection" restriction, which can block large file transfers.
- 🚫 Disable VPN and proxy servers during setup.
- 📡 Check if the network SSID is hidden (hidden networks require manual entry).
- 🔋 Make sure your phone doesn't have power saving mode enabled, which blocks background processes.
- 🔄 Restart your router if no devices can connect to the network.
If the printer's indicator light is orange, it indicates an error. Brief flashing indicates a weak signal, while a steady light indicates a connection error. In the latter case, repeat the network settings reset procedure and try moving your phone closer to the device.
Printing and scanning from mobile devices
Once successfully connected, you can print from any app that supports the system print function. On Android, this is typically done via the "Share" -> "Print" menu. iOS uses AirPrint, which doesn't require installing additional drivers. Simply open a document or photo, tap the icon, and select HP Deskjet 3639.
To scan documents back to your phone, use the app HP SmartSelect "Scan," and the app will open the scanner control interface. You can select color, resolution, and save format (PDF or JPEG). The scanned file can be immediately emailed or saved to cloud storage.
Print quality depends directly on the settings you choose. Standard resolution is sufficient for text, but for photos, select "Best" or "Maximum Quality" and use special photo paper. Keep in mind that printing high-resolution images over Wi-Fi may take longer due to the amount of data transferred.
Why doesn't the printer print even though it's connected to Wi-Fi?
Most often, the problem lies in the print queue. Go to the printer settings on your phone and clear the queue. Also, check the ink levels in the cartridges—low ink levels can block printing. Make sure your phone and printer are on the same subnet (the first three digits of the IP address are the same).
Is it possible to connect HP 3639 to a computer wirelessly?
Yes, if the computer is on the same Wi-Fi network. In Windows 10/11, the printer should be detected automatically through the "Devices and Printers" section. If not, use the Add Printer wizard and select "Add by IP address," entering the address printed in the network report.
How to find out the IP address of a printer?
Press the "Information" button (the i icon) on the printer's control panel. The printer will print a report showing the current IP address. You can also view the address in the HP Smart app under printer settings.