If there is an error during startup, hit Tab to show the detailed error information.

Boot into recovery mode: Hold ESC and Reload (circle) keys when powering on, keep holding until something appears on the screen.
https://www.google.com/chromeos/recovery


Error during startup or recovery: "The security module on this device is not working"
This solution did work for me on an Acer:
https://support.google.com/chromebook/thread/11392753/chromebook-asus-c302c-0x2b-0x2b-secure-nvram-tpm-initialization-error?hl=en

At the restore screen, with the AC plugged in, press Refresh + Power (the screen will go black), WHILE holding those buttons in, unplug the AC. Let go of Refresh + Power. The screen might come back on at this point, but it will shut off automatically. If it worked, you won't be able to power the unit back on with the power button. Plug in the AC, and the unit should power back on.

Power off, hold Windows+B, power on and keep holding for 20+ seconds.
Power off, hold Windows+V, power on and keep holding for 20+ seconds.
Power off, hold all 4 arrow keys, power on and keep holding for 20+ seconds.
https://support.hp.com/us-en/document/c02693833

Unplug power and battery, disassemble and reset CMOS
https://h30434.www3.hp.com/t5/Notebook-Boot-and-Lockup/Laptop-Will-Not-Boot-After-BIOS-Update/td-p/6716008



Keywords: Bios, Upgrade, Update, black screen, froze, freeze

This lets you disable "ACPI Lid" so that windows is not notified if the screen closes. This can fix the screen turning off for a faulty sensor, or external monitor glitching resolution.

1. open device manager
2. in "System devices" find "ACPI lid"
3. Open "ACPI lid" properties, and go to "Driver" tab.
4. Select "Update driver"
5. Choose "Browse my computer for driver software" and "Let me pick..", then uncheck "Show compatible hardware"
6. And now...in "Manufacturer" select "Microsoft" and model: "V...<Too long, click to read the rest>

I fairly often have to reinstall Windows on my portable work laptop. Here are the steps to do after getting the drive wiped and windows reinstalled.

Activate Onedrive
Activate Bitlocker

Install TeamViewer
Install Anydesk
Install Chrome
Install Firefox
Install Office

Install Wireshark
Putty on desktop

powercfg -h off