Spectre x360 cannot access BIOS menu or setup. Boots to blank screen

[MrDonuts]

When I opened the laptop out of sleep mode, it froze on the lock screen. When I powered it off and turned it back on, it booted to a blank screen. Now, it will only boot to a blank screen. I press the power button, the computer turns on, the power light goes on, and the computer goes to a blank screen. The keyboard seems to work (when I press the Caps Lock key, the light goes on), but the computer stays on the blank screen. Nothing has worked. Here is what I have tried:

I tried connecting the computer to an external display. No joy. 

I tried to access the setup, diagnostic, and BIOS menus. I pressed Esc, or F10, or F2, or F12 until my fingers bled. I have fast boot, so I have pressed each of these keys before hitting the power button and then spamming the keys for a good 5-10 seconds after the blank screen appears. I tried fn + F10, 12, 2, etc. Combinations, (Esc + F10) but nothing. The menus don't come up. 

I tried Win + B. Didn't work.

I tried Win + V. It worked. I got the following message: 

"The CMOS checksum is invalid. The CMOS will be reset to the default configuration and will be rebooted. Please check your BIOS Setup options to see if they change. 

CMOS Reset (502)

ENTER - Reboot the system"

If I press Enter, it shuts off and restarts to a blank screen. After 15 seconds, same thing. Restarts to a blank screen.

I have tried A BIOS recovery through downloading the previous BIOS version from the HP website onto a USB. I followed the instructions for the Spectre and tried to recover through the USB. Nothing. BIOS recovery/update screen never comes up. Just the blank screen.

Help?

[CherylG]

Have you tried a power reset?

https://support.hp.com/us-en/product/hp-spectre-15-bl000-x360-convertible-pc/13823372/model/15241989...

[CherylG]

If a power reset doesn't help I would probably next try reseating memory modules.

If no joy I would then unplug the SSD and see if machine will boot into BIOS using Esc, F10 at power on.

Spectre is not an easy laptop to do these basic troubleshooters on but the Maintenance and Service Guide should help:

https://support.hp.com/us-en/product/hp-spectre-15-bl000-x360-convertible-pc/13823372/model/15241989...

[MrDonuts]

Thank you, Cheryl! I had tried a power reset. Didn't work either. I took your advice and tried what you suggested. I removed the battery and unseated the memory. Put it all back and tried again. Nothing. Still when I press the power button it goes to a blank screen. No HP logo, no boot up, nothing. Out of ideas!

[CherylG]

Did you try the other suggestion? Remove the SSD and see if it will boot into BIOS? Immediately after pressing power button start tapping Esc key. If it shows the startup menu and lets you use F10 to enter BIOS setup it would indicate a bad SSD preventing booting.