Showing results for 
Search instead for 
Did you mean: 
The HP Calculator Community Message Board is moving. While we prepare for the move, we are unable to accept new postings. During the move, you can look for help from other users by visiting . Or if you need technical support for your calculator visit: HP Calculators. .
New member
1 0 0 0
Message 1 of 2
Flag Post

Spectre x360 Not Starting - 5.3 Caps Lock Blink - Time out waiting for BIOS

HP Recommended
HP Spectre x360 - 15-CH011DX
Microsoft Windows 10 (64-bit)



I am using HP Spectre x360 15-CH011DX and I am stuck with a black screen.


Battery was almost drained when the laptop went in sleep mode. After that when I tried to restart, the Caps lock is blinking 5.3 implying that the embedded controller timed out waiting for the BIOS.


I was looking for the possible fixes and I have already tried out a hard reset (holding the power button for 15 seconds) and also drained the battery.


I even tried to go for the BIOS update but holding Win+B isn't working. Escape/F10 buttons aren't working either on power up.


It's expected to be a motherboard problem. Contacted HP here in India but they said that this particular product isn't supported in India and they wouldn't be able to provide any assistance. And given the situation, I wouldn't be able to take it to the US to get it fixed. 


If anybody can advise what could possibly cause this or has any other fixes which I can try. Maybe I can open it up myself or take this to a local repair shop.


Thank You

HP Support Agent
HP Support Agent
29,155 21,825 1,961 2,158
Message 2 of 2
Flag Post
HP Recommended



Welcome to the HP Support Community. 


Please look for a private message from me requesting additional information. Keep in mind not to publicly post personal information (serial numbers and case details).


If you are unfamiliar with how the Community's private message capability works, you can learn about that here.


Thank you for visiting the HP Support Community.

I am an HP Employee

Was this reply helpful? Yes No
Warning Be alert for scammers posting fake support phone numbers and/or email addresses on the community. If you think you have received a fake HP Support message, please report it to us by clicking on "Flag Post".
† The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation