When a multifunctional device (MFP) asks for a wireless network password every time it's turned on or idle, it can be confusing and annoying for users. Instead of being able to print documents right away, you're forced to re-enter your login credentials, search for the router, or remember a complex combination of characters. This behavior indicates that authentication process was not completed successfully or saved data was lost.
This scenario is often related to the specifics of the printer's firmware and its interaction with the router. Security protocols Modern networks require reliable access rights verification, and if a device can't verify access rights in its non-volatile memory, it goes into connection standby mode. This isn't always a malfunction; often, it's due to power-saving settings or IP address conflicts.
In this article, we'll take a detailed look at why you're constantly prompted for authorization, how to properly configure a static address, and which router settings affect connection stability. Understanding these processes will save you from unnecessary fiddling with buttons and menus. It's critical to understand that network resets are most often caused by sudden power outages or power surges, not by software errors.
Mechanism for storing network parameters in the printer's memory
Many users mistakenly believe that an MFP stores passwords as securely as a smartphone or laptop. In fact, network modules in printing devices often have a simplified architecture. When you enter a password, it is encrypted and written to a special section of memory. If this section or the configuration file is damaged, the device "forgets" its credentials every time it is powered off.
The main problem lies in how the printer receives an IP addressBy default, most devices are configured to obtain an address dynamically via DHCP. The router assigns a new address each time from a pool of available addresses. If the router is busy or the address pool is full when the printer is turned on, the device may not receive the correct address and, therefore, will not be able to re-authenticate on the network.
In addition, there are models where the settings are reset when switching to deep sleep mode. Some energy saving protocols The Wi-Fi module is completely disabled to save power. When awakened, the module must re-initiate the connection. If the router's response timeout is too long, the process is aborted, and the security system requires re-entering the data for confirmation.
⚠️ Attention: If your MFP requires you to enter a password after each turn-on, this may indicate the degradation of the device's internal flash memory, which can no longer hold data.
Problems with DHCP and IP address allocation
Dynamic Host Configuration Protocol (DHCP) is the standard method of address allocation, but it has its drawbacks in the context of printing equipment. When an MFP is turned on, it broadcasts a request for a DHCP server. The router responds with an offer. If this dialogue is interrupted, the printer does not receive an address and cannot connect to the network for authentication.
A common cause of failures is lease expiration. The router may assume the printer's address has expired and attempt to assign it a new one. However, the printer, attempting to retain the old address, encounters a conflict. As a result, the network connection is lost, and the device interface prompts you to set up Wi-Fi again.
The solution to this problem is often to configure static IP addressBy assigning a permanent address to a device, you eliminate the need to request and receive an address each time. This makes the connection more predictable and stable.
It's also worth considering the number of connected clients. Home routers often have a limit on the number of devices (for example, 10 or 32). If this limit is reached, your MFP simply won't receive an address and will remain in standby mode.
Setting up a static IP address for stable operation
To avoid DHCP issues, we recommend entering a static IP address directly in the MFP settings or reserving one on the router. This permanently binds the device to the network. To do this, you'll need to know the gateway address (usually the router's address, e.g., 192.168.0.1) and the subnet mask.
The setup process typically goes like this: open the device's menu, select "Network Settings," then "TCP/IP Settings." Here, you need to disable the "Auto IP" or "DHCP" option and manually enter the numbers. It's important to select an address outside the router's dynamic range to avoid conflicts with other devices.
Usage static address It also speeds up the printing process. The computer doesn't need to search for a printer on the network; it always knows where to send the data. This is especially important for office networks, where the response speed of peripherals is crucial.
☑️ Setting up a static IP
Don't forget to specify DNS servers if your printer supports cloud features (such as internet printing or AirPrint). Without correct DNS addresses (e.g., 8.8.8.8), some network services may not work, even if you have a local connection.
Impact of WPA2 and WPA3 security standards
Modern routers use encryption standard by default WPA2-PSK or newer WPA3Older MFP models may simply not support new encryption protocols. If the router is configured for mixed mode or forced WPA3, the older device may endlessly attempt authentication but be denied access.
In this case, the router logs will show association attempts followed by a connection break. The device "sees" the network but cannot perform a handshake to exchange keys. In the printer interface, this is displayed as a password request or a connection error.
It is recommended to check your router's wireless network settings. Try temporarily switching the security mode to WPA2-PSK (AES)This is the most compatible standard, supported by virtually all devices released in the last 15 years. Avoid using the outdated WEP or TKIP, as they are insecure and can be blocked by modern operating systems.
| Parameter | Recommended value | Description |
|---|---|---|
| Security Mode | WPA2-PSK (AES) | The most compatible and secure mode |
| Encryption | AES | Encryption algorithm, avoid TKIP |
| Channel Width | 20 MHz | For the 2.4 GHz band, it provides better stability |
| Band | 2.4 GHz | Most printers do not support 5 GHz. |
⚠️ Note: Some routers automatically separate 2.4 GHz and 5 GHz networks into different SSIDs. Make sure the printer is connected to the 2.4 GHz network.
Dual-band routers and frequency separation
One of the most common causes of connection problems is confusion over frequency bands. Most MFPs operate exclusively in the frequency band 2.4 GHzThey are physically unable to receive a 5 GHz signal. If your router broadcasts the same network with the same name for both bands (Smart Connect), the printer may attempt to connect to the 5 GHz frequency, fail, and reset its settings.
The solution is to separate the networks. Go to your router settings and assign different SSIDs for the 2.4 and 5 GHz bands. For example, "Home_WiFi_24" and "Home_WiFi_5." Connect the MFP strictly to the network ending in "24."
It's also worth paying attention to the channel width. In the 2.4 GHz band, it's better to set the channel width 20 MHzAutomatic selection or value 40 MHz often lead to unstable operation in apartment buildings due to noise pollution from neighboring routers.
Why doesn't the printer see the 5 GHz network?
Wi-Fi modules in printers are often budget-friendly single-band solutions. They lack the hardware capability to operate at 5 GHz frequencies, so even with a strong signal, they simply ignore these networks.
If the printer is located far from the router, the 2.4 GHz signal may be weak. In this case, it's better to use a wired connection or a Wi-Fi repeater, which will rebroadcast the signal within the required range.
Diagnosing and resetting network settings
If none of the above methods help, it's possible that errors have accumulated in the configuration. In this case, a complete reset of the MFP's network settings would be an effective solution. This will restore the network module to factory settings and clear any possible software glitches.
This feature is typically found in the "Settings" menu, then "Network" or "Wireless." Look for "Restore network settings" or "Reset TCP/IP." After this operation, the printer will reboot, and you'll need to run the Wi-Fi setup wizard again.
When reconfiguring, use the WPS method if supported by your router and printer. This allows the password to be transmitted automatically without entering it on the device's keyboard. Press the WPS button on the router, then select the corresponding option in the printer menu.
After a successful connection, it's recommended to immediately check for firmware updates. Manufacturers frequently release patches that fix issues with router compatibility and security protocols.
Frequently Asked Questions (FAQ)
Why does the printer forget the password after being unplugged?
This occurs if the settings weren't saved to non-volatile memory or if the configuration file is corrupted. It could also be caused by a DHCP failure, where the device fails to obtain an address before power is lost.
Is it possible to connect an MFP to a hidden network (Hidden SSID)?
Yes, most modern models support connecting to hidden networks. However, you'll need to manually enter the network name (SSID) and security type, as automatic detection won't find the hidden access point.
Does antivirus software on my computer affect my printer's Wi-Fi connection?
Antivirus software on a PC itself doesn't affect the printer authentication process with the router. However, a firewall can block data exchange between the computer and printer after they've connected to the network.
What to do if the router only distributes 5 GHz?
You need to go to your router settings and enable the 2.4 GHz band. Without this band, most MFPs simply won't be able to connect to the wireless network. If your router is old and doesn't support 2.4 GHz, you'll need to replace it or purchase a separate access point.