HP Spectre x360 Blink Code 5.3

[spectre5730]

My Spectre x360 13 won't boot. On pressing the power button, the Caps Lock LED blinks (5 long and 3 short) while the screen remains black. I've tried hard reset, BIOS update, etc. Sometimes, it will start up and work normally and other times, it won't. 

The 5.3 blink code refers to "embedded controller times out waiting for the BIOS" on some forums and "general system board failure" on others. I've also seen something about "attached peripherals" in some charts, so definitely confused on what's happening and how to resolve it. 

I'm reluctant to take it to an HP Service Center since they're pretty trigger happy to recommend replacing the motherboard or some other expensive repair. This is just the second year of a very premium notebook and I've already had to replace the SSD due to HP's faulty software (documented on another forum post). Please help! 

[KrazyToad]

@spectre5730

Welcome to HP Community

I have gone through your Post and would like to help

Unfortunately this is a Hardware issue with the Motherboard. Please contact HP Support for Service Options

1) Click on this link - www.hp.com/contacthp/ 
2) Select your product type below.
3) Enter the serial of your device. 
4) Select the country from the drop-down. 
5) Select the chat or get phone number options based on your preferences. 
6) Fill the web-form and proceed further.

Thank you

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" on this Post and it will also help other community members with similar issue.