Add step to ensure power is fully drained from components

My thelio can get in this state even on a normal/safe shutdown sometimes. Has happened infrequently enough that I forget this crucial step each time haha

Author: winfred

content/power-on-failure-desktop.md

@@ -23,10 +23,11 @@ tableOfContents: true
 2. Confirm the outlet works by plugging in another device.
 3. Be sure that the system is on a flat surface
 4. Desktops have a button on the power supply located at the back of the computer. Toggle that button and make sure it is in the 'On' position though it may be labeled as a '1' to note that it is powered on, then attempt to turn the desktop on.
-5. If the power button lights up, the power supply is providing power to the machine. It is recommended to check the display connections next.
+5. If it still does not turn on but you see lights on, you may need to drain power from all of the components before trying again. Unplug the power supply and then press and hold the power button for 6 seconds. This will drain power from all of the components. Now plug the power supply back into the wall and try to boot.
+6. If the power button lights up, the power supply is providing power to the machine. It is recommended to check the display connections next.
     * 5a. If the display connections are not at fault, investigate internal components using steps outlined in this [article](/articles/hardware-failure).
-6. If the power button does not light up, the computer may need a new power button or power supply. To troubleshoot the power button on a Thelio desktop, visit this [link](https://tech-docs.system76.com/models/thelio-massive-b1.2/repairs.html#troubleshooting-the-power-button).
-7. Does the computer turn on when using the power switch on the Thelio IO board instead of the button? The backup power button is located on the IO board near the power button on the internal part of the case.
+7. If the power button does not light up, the computer may need a new power button or power supply. To troubleshoot the power button on a Thelio desktop, visit this [link](https://tech-docs.system76.com/models/thelio-massive-b1.2/repairs.html#troubleshooting-the-power-button).
+8. Does the computer turn on when using the power switch on the Thelio IO board instead of the button? The backup power button is located on the IO board near the power button on the internal part of the case.
 
 ![Thelio Io power button](/images/failure-power-on/thelio-io-power-button.png)