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Quick answer
Confirm the printer selected your own Wi-Fi name, then enter that network’s current Wi-Fi password privately, including its exact capital letters. TS-05 identifies incorrect SSID or network-key information; TS-06 also involves authentication or encryption settings. If the same password works on another device, check the printer’s supported Wi-Fi security and band before resetting anything.
Choose the check that matches your symptom
Start with the row that describes what you see. You do not need to try every step.
| What you notice | Where to start |
|---|---|
| Wrong Network Key or TS-05 | Verify SSID and private password entry |
| Correct key, but TS-04/TS-06 | Check security and band compatibility |
| Printer says Connected; computer says offline | Move to queue and addressing checks |
Before you start
- Use the exact model and platform described below. If a label or connection differs, stop and identify it before changing settings.
- Keep passwords, verification codes, serial numbers and private documents out of any help request. Use synthetic or redacted details when describing an error.
Why this happens
The network key is the Wi-Fi password, not a Brother administrator password or an account sign-in. Similar network names, a changed router and an unsupported security mode can produce different connection failures. Installing a computer driver cannot correct a password rejected by the printer itself.
What to do, step by step
Try one step at a time. Stop when the issue is resolved. If an instruction doesn't match your device, use the official model-specific guidance instead.
Identify the exact message and printer model
- Read the printer’s model label and the complete connection message. If a WLAN report is available through your model’s menu, record the TS code without sharing its network details.
- Separate TS-05 from TS-06 or TS-04. TS-04 points to unsupported authentication or encryption; it does not establish that the password was typed incorrectly.
- If the printer already says Connected but a computer says offline, use the separate queue/connection guide instead.
Check the Wi-Fi name and current password
- On a device you own, check the name of the Wi-Fi network that is currently working. Choose that same intended network on the printer, avoiding a similarly named neighbor or isolated guest network.
- Obtain the current Wi-Fi password from your own saved network details or the authorized router administrator. A label can be out of date if the password changed.
- Compare capital letters, zero versus the letter O and accidental leading or trailing spaces. Do not post the password in chat.
Enter the key once using the matching setup menu
- On a Brother button-panel model that displays this path, select Settings, Network, WLAN and Setup Wizard, pressing OK to enter each menu. Other models have different paths: stop if these labels do not match.
- Select your verified SSID, enter its network key carefully and select OK. Accept the displayed Yes/apply choice only for your intended network.
- Wait for the result. Connected means the authentication attempt succeeded; record a new TS error rather than repeatedly submitting an unchanged key.
View larger Check model-specific band and security compatibility
- If entry is correct but rejected, compare your exact model’s supported band and authentication/encryption with the router configuration. Older models and newer models differ.
- Ask the router administrator about a supported secure configuration. Do not turn off the Wi-Fi password, switch to WEP or weaken an office network to make one printer connect.
- Use an already available supported USB or Ethernet connection as an alternative if appropriate. A wired option does not require exposing an unsecured wireless network.
Confirm the connection before fixing the computer
- After the printer reports Connected, allow about a minute for network addressing. Use its Network Configuration report if supported by the model.
- An all-zero address or a 169.254 address on an ordinary router-based home network can indicate that normal addressing was not obtained. Ask for model-specific network help rather than entering random fixed addresses.
- Try one small print job from a device on the intended network. If authentication succeeded but the queue still fails, continue with the Windows or Mac offline-printer guide.
Still not working? Know when to stop
Stop before network resets, router-security changes or office-network changes without the administrator. Never reveal the Wi-Fi password. Seek Brother or router support with the model, TS code and checks completed if a supported configuration still fails.
Write down the exact model and error message before contacting official support.
Still seeing the same problem?
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Useful tools, only if they fit your situation
Try the free checks first. Compare these optional products for the specific uses below; buying equipment does not guarantee a fix.
- Optional premium comparisonOptional
Brother MFC-L8930CDW business color laser all-in-one
A larger workgroup printer for frequent color documents and substantial two-sided scanning.
- 7-inch touchscreen with scan preview and customizable shortcuts.
- Two-sided scanning with an 80-sheet document feeder; Gigabit Ethernet and dual-band Wi-Fi.
Consider only when: You need those workgroup features or a replacement after a confirmed hardware fault.
Check compatibility: US model; measure desk space and budget for its own TN635-series toner. Ethernet offers a wired alternative, but this printer will not fix an incorrect Wi-Fi password or router security mismatch.
Get on Amazon Paid link · Amazon.com - Optional premium comparisonOptional
Brother MFC-L8730CDW business color laser all-in-one
A second workgroup comparison when duplex document handling matters more than the larger display of the MFC-L8930CDW.
- 3.5-inch touchscreen and 80-sheet automatic document feeder.
- Automatic two-sided print/scan/copy, dual-band Wi-Fi and Gigabit Ethernet.
Consider only when: You need color laser output and automatic document scanning; compare both models instead of buying for a network-key error alone.
Check compatibility: US model with different toner-yield and scanning specifications from the MFC-L8930CDW. Verify computer/mobile support and ongoing supplies; an Ethernet connection still needs a working local network.
Get on Amazon Paid link · Amazon.com
Related problems to check
Frequently asked questions
Is the network key my Brother password?
Usually this prompt wants the password for the selected Wi-Fi network. The printer’s administrator password and a Brother online account password are separate.
Why does my phone connect but the printer does not?
The phone may support a band or security method that the printer does not. It may also have a saved password while a different key was entered on the printer. Verify both possibilities.
Should I reset the printer?
Not as a first step. A network reset removes connection settings and may disrupt other users. Gather the exact model, SSID and error first.
Will a new printer fix TS-05?
Not if the same wrong password or router restriction is used. Compare a replacement only for a real compatibility need, feature upgrade or diagnosed hardware fault.
Sources and editorial transparency
Documentation checked: 2026-11-13. Our instructions are written for this guide. Interface labels can change; this is a source review, not hands-on testing of every device.
Reference titles and source dates
- Brother — Wireless TS error codes
- Brother — Button-panel wireless setup