pavilion won't power up

[BlackBird16]

My HP pavillion was accidently unplugged about 2 days ago while in sleep mode.  Now it won't power up.  It was not jarred or dropped.  I tried the initial steps of removing the batter and power code, draining the power, then hitting the on switch for 30 seconds, but nothing changed.  The screen goes 'white', the fan starts up, but the LED lights on the CAP LOCK and NUM Lock keys don't come on.  The WiFi LED does turn on.  Then, after about 1 second the fan and the screen shut off, and the WiFi light goes off.  This happens whether the battery is in or not.  The only USB plug I have in it is for the mouse but I removed it too.  This set of symptoms is not covered on the http://support.hp.com/us-en/document/c01443371 page, which also doesn't cover Windows 10, but I don't see how the OS would have anything to do with it.

[Resolv_S · Accepted solution]

Hi @BlackBird16,

Welcome to HP Forums.

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To help you with the right solution, please share the model number of the HP product.

Also try the following steps and check if that helps.

http://hp.care/2byfHyh

Let me know how it goes.

Resolv_S

Glad to help you. I work for HP

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[BlackBird16]

This is essentially what I did yesterday, but this evening it worked. 

Thanks for your help!