Hi rehampton,
First, please follow these steps to disable IPv6 on your PIXMA TS6420:
1. Please press the OK button on your printer 1 time.
2..Use the down arrow to select Device settings and press OK.
3. Use the down arrow to select LAN settings and press OK.
4. Select Wi-Fi and press OK.
5. Select Advanced (not Advanced Mode) and press OK.
6. Select TCP/IP settings and press OK.
7. Select IPv6 and press OK.
8. Select Yes and press OK.
9. Select Enable/disable IPv6 and press OK.
10. Select Disable and press OK.
11. Repeatedly press the Back button (above the OK button) to return to the main screen of your PIXMA TS6420.
Once you have completed this, please follow these steps:
1. Please press the OK button on your printer 1 time again.
2. Use the down arrow to select Device settings and press OK.
3. Use the down arrow to select LAN settings and press OK.
4. Select Wi-Fi and press OK.
5. Select Show setting info and press OK.
Using the down arrow, take note of what is listed below to IPv4 address.
Back on your Chromebook, please open the Chrome web browser. In the address bar of that web browser, please type in the IPv4 address that you saw on your printer.
Does the printer's status page appear?
If so , please attempt to print.
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