HP Pavilion Notebook - 15-p100dx (ENERGY STAR) Won't Turn on

[fixingeek]

Was using my notebook last night, powered down and fell asleep. This morning I tried to power up and the power button has no effect. Al I can see is the little power LED let next to the power cord lit. I press the power button and 'nothing'. I hold the power button down but , nothing. 

Does anyone have any ideas on how to troubleshoot this?

[CF4]

Hi

Hard reset, but you may already have done this...

Please 1st try a Hard Reset

Press and Hold the PWR off button for 4 seconds to force a PWR off.

Unplug from the wall.

If you see a battery compartment door, your computer has a removable battery.

Remove any removable battery.

This is valid for most notebooks;

Press and hold the power button for 15 seconds to complete the reset.

Re-insert any battery you removed.

[fixingeek]

Hello,

I tried to hold the button down for 15 sec with the battery out. The only thing I noticed was the power LED blinking about 3 times. The LED blinking is not repeatable. 

[edit]

Unless someone has another suggestion this is looking like a teardown.

[CF4]

Hi

https://support.hp.com/us-en/document/c02693833

Turn off the notebook.
Plug the notebook into a power source using the power adapter.
With the notebook off, press and hold the Windows logo key and the B key at the same time (WinKey +B).

NB: On some notebook models, it might be necessary to press and hold the Windows logo key and the V key (WinKey +V).

While pressing those keys, press and hold the Power button on the computer for 2 to 3 seconds, and then release the Power button but continue to hold the Windows logo key and the B or V key until the HP BIOS update screen displays or you hear a beeping sound (usually 8 beeps).

[fixingeek]

Hello,

I tried holding down the Windows Keys + 'B' key then pressing the power button for 2-3 seconds.

The only thing that happens is the (now orange charging LED by the power jack) simply blinks.  

I am unable to power up the system so all the other options in the link you provided are irrelivant. 

[fixingeek · Accepted solution]

After tearing down the laptop I found the problem.  The LED blinking with 1 slow blink ended up being a DC short on the 5V USB rail.

I work with a USB gadget called an Arduino. Arduino's can be modified with add-on's called shields. Well, I was playing around with a shield which was an electric motor driver (LOTS OF CURRENT FOR A USB PORT) hooked up to the USB port. I ran the motor in full current mode and it ended up frying the port.

To make a long story short I ended up shorting the 'right' USB port which is mounted on a module (DAY11ATB6G0). I simply disconnected the module from the motherboard and removed it from the laptop. Now my system boots with no issues.