screen goes black; caps lock blinks 1 long 1 long 2 short

[laquisha123]

Windows 10 Pro

HP Envy x360

For the last couple of months, my laptop will be on and the screen will randomly go black.  No mouse, no keys, nothing.  The caps lock will blink 1-long, 1-long, 2-short.  I have to hard kill it and restart it.  Thus far, it has always restarted.

This has happened after shutting the lid and putting it to sleep.  It has happened after turning it on and not logging in right away.

Once on and immediately used, it seems to be fine.  

I took it to a repair shop and told nothing was wrong with it.  Was told maybe it was a bad Windows Update.  He claimed sleep was probably the culprit and turned it off.  (Of course, the issue wouldn't happen while it's there!)

Now it happened again today after turning it on and not logging in right away.

Google suggests a BIOS corruption, but the repair guy said it would not turn on if it was BIOS.  Got the old "a laptop of this age" speech.  

Any ideas?   Any ideas of what to look for?

Thanks!

[laquisha123]

Follow up:

Today, the laptop wouldn't boot.  Black screen and same code... caps lock blinking 2-long 2-short (I changed my description from 1-long 1-long 2-short in case I'm not describing it correctly).  

Tried it a few times with the same result.

Then unplugged the laptop for a few minutes and it booted.  

Is there a diagnostic I can run?  I don't believe the repair guy.

Thanks!

[sandytechy20]

@laquisha123 

Welcome to the HP support community.

I understand that you are getting 2 long and 2 short beeps from your notebook, I am glad to assist you.

This condition indicates that the main area (DXE) of the BIOS has become corrupted and no recovery binary image is available. Recover the BIOS.

Perform a BiOS recovery to fix this issue.

Here are the steps:- Click here

Refer to this HP document for further assistance:- Click here

Keep me posted.

If this helps, please mark the public post as an accepted solution so that it benefits several others.

Cheers.