http://www.tomsguide.com/forum/86141-35-toshiba-laptop-keyboard-working

​For anyone with this issue after weeks of trying to figure this out I finally ran across something. ​Hold down the right shift key for 10 seconds. That's it. You will hear a sound and it will work again!

1.- Press settings
2.- Press All Settings
3.- press Machine Info
4.- press Parts Life
5.- Touch the dial pad area to light up the LEDs, and then press
# until the Touchscreen message changes.
6.- Press the color of the drum unit you replaced.
7.- Press Yes

For Brother MFC 9330/9340 CDW

messages: printer error, check with manufacturer, blah blah

this is old school printer, cartridge number is #48, the ink cartridge slot got stuck, first release it 
by prying on the back stand.

second download the SSC utility and reset the waste counter.

​vola, done

​The only thing that really works is this solution:

1. Turn off the fax/printer and turn it on again.
2. Wait till the screen shows the Ready display.
3. Press the Menu (wrench icon) button.
4. Press the Left (Left arrow) button and the OK button simultaneously
5. You should see the 2ndary Service. Press OK to select.
6. Press right arrow until you find File Sys Format. Select that.
7. Wait until the system finishes the formatting. After that, the fax/printer should be fine and ready to receive new faxes again.

Note: If the screen shows blank or just "Initializing" and the keys on the panel are non-respondent, just open the compartment where the toner is located. You will see the "Door Open" displayed on the screen; you can now press any key after that.

the chip can be reset, but the tank was made for one time use only

I gotta this macbook pro, OSX 10.9.5 to service on wireless card missing or disabled after restart, by 
referring to the following advice, the third suggestion is working on my case. :)


Mac Wireless Connection Problem Troubleshooting: Advanced* Zap the PRAM – Reboot your Mac and hold Command+Option+P+R during restart until you hear another chime, let the Mac boot as usual.

* Delete Wireless Config files – Delete com.apple.internetconfigpriv.plist and com.apple.internetconfig.plist files from ~/Library/Preferences and reboot

* Trash your home directories SystemConfiguration – Remove all files within ~/Library/Preferences/SystemConfiguration/ and then reboot your Mac.

* Reset your Mac’s System Management Controller (SMC) – For MacBook and MacBook Pro’s: Shutdown the MacBook/Pro, remove the battery, disconnect the power, hold the Power Key for 15 seconds. Replace the battery, reconnect power, and zap the PRAM and wait for 2 chimes before letting the keys go. Let boot as usual.

I've got some returns on HP 950xl & 951xl compatible, the relevant printer, e.g. officejet, kept rejecting it. tried every trick ways; but there is no problem to take original HP refilled ones; LOL