My HP6500 wireless all-in-one says its offline & my computer won't recognize it. I unplugged it then restarted it--didn't help. What does it mean to be offline? How can I get it online?

try resetting user profile
https://www.techbout.com/fix-corrupt-user-profile-windows-10-9139/

Is the Pixma connected to a wireless router (or connected by USB or ethernet cable)? It could be that the router connection failed. Try restarting the router, or repeat wireless connection on the Pixma.

Few sugesstions :

1) Check whether if your windows is installing new updates, sometimes YM does crash when window is updating. If you are using Win7, then just go to: --> Control panel/ System & security/ Windows Update/ Change setting. In the setting panel, you will see " Important Updates " box selection. Change it to "Check for updates but let me choose whether to download & install them". Restart your pc/laptop, then try log in to your YM.

2) *This step won't be necessary but won't do any harm too, go to: Control Panel --> System & Security --> System --> Advance System Settings. In the " Advance " tab, click "setting" at the " performance " column. Select " Data Execution Prevention ", select " Turn on DEP for all programs & services except those i select", Insert your YahooMessenger.exe (C:/Program Files/Yahoo!/Messenger/YahooMessenger) into the add list. Restart PC/laptop & try to log in to YM.
3) If those won't work, uninstall your current YM, restart your pc/laptop, then try installing a new one. Link : a)http://www.mydigitallife.info/yahoo-messenger-10-final-full-version-offline-standalone-setup-installer-download/ b) http://www.geckoandfly.com/6309/download-yahoo-messenger-10-full-offline-installer-15-8mb/
** If it still crash, then your internet connection might be the problem, & also, Yahoo! can be down sometimes too.

Brother printers are cost-effective printers that give up to mark printing. In addition to printing, a user can copy and scan from the printer works into a USB and also a wireless connection.
In Brother printers, offline failure happens once in a while. This writeup tells about the reasons for this error along with their solutions. We have read 'how to fix why is Brother printer offline issue' for both Windows and Mac operating systems.

Reasons that cause this irritating Brother Printer Offline Windows 10:-

1.Paper jam error.

2.Ink toner blockage.

3.Error in the network connection between your computer and printer.

4.Wicked or outdated printer drivers.

5. If the printers ' use offline mode' is selected, it may also show the offline error.

6.Wrong printer settings.

Just follow the steps which are mention on the blog to fix the Brother Printer Offline Windows 10. We give online help for Any problem in printers our Call us on TOLL-FREE NUMBER in our BLOG.

After installing new drivers, sometimes you need to restart your computer.

restart computer

Go to Start/Control Panel/Printers and faxes. Right click on the Canon icon and click on Offline turn toggle it back to Online. Please rate this answer.
Cheers
Bob

Do you have PCMCIA adaptor or buil-in adaptor? If is pcmcia then unplug from computer, restart computer, after this shut down, plug your pcmcia and start again.

Uninstall the Keyboard driver.
Unplug the Logitech keyboard.
Restart the computer.
Plug the Logitech keyboard back into the computer.
Windows should recognise the keyboard and/or the mouse.
Place Logitech setup disk in drive.
Reload the drivers...

The drivers sometimes corrupt themselves..
You might download the latest drivers for your keyboard/mouse.

Hi there,

• Unplug the printer cable from the computer.
• Unistall the printer drivers from Device manager and also unistall the all the printer appications
• restart the computer
• try to download drivers from the website
• after installing drivers and software it will ask you to connect the printer.
• then you can connect the printer and and try to Print the test page.

Hope this help. Please Rate My Response! Thanks! 
PREM