HP ProBook 450 G0 dead sleep issue

[gabberZ]

The issue is that the laptop went to sleep with DC plugged in and now will not wake up. It acts like a brick.
I tried taking out battery, unplugging DC and holding power button for 15 (20 and even 60) seconds to make so called "Hard Reset" but had no success. It shows no signs of life, even power led is not flashing when plugging in DC.

Specs:
HP ProBook 450 G0
1366x768 HD4000
Wi-Fi replaced to AR9287 (id fixed)
Yosemite via Chimera4

Was just going to patch DSDT but it went to this "sleeping beauty" state.

Maybe someone had the same issue and knows how to bring it back to life?
Thank you all!

 

[RehabMan]

The issue is that the laptop went to sleep with DC plugged in and now will not wake up. It acts like a brick.
I tried taking out battery, unplugging DC and holding power button for 15 (20 and even 60) seconds to make so called "Hard Reset" but had no success. It shows no signs of life, even power led is not flashing when plugging in DC.

Specs:
HP ProBook 450 G0
1366x768 HD4000
Wi-Fi replaced to AR9287 (id fixed)
Yosemite via Chimera4

Was just going to patch DSDT but it went to this "sleeping beauty" state.

Maybe someone had the same issue and knows how to bring it back to life?
Thank you all!

Sounds like a hardware problem. Bad battery or bad AC adapter. Or worse.

 

[gabberZ]

Thank you! Issue solved.
There was a DC problem + empty battery.
But hard reset works, if someone is interested.
Had to setup BIOS again after these manipulations.