Hp ProBook 450 G2 laptop does not turn on and has some light codes

[enzo1234]

I have a laptop Probook 450 G2.

The laptop does not turn on .

When I connect the battery , or when I connect the power supply , instantly ( without pressing the power button ) some light codes are appearing :

• Power button light is on

• Caps Lock light is on

• The light near power connector is blinking.

• The screen is black

[BharathVictory]

Welcome to HP Forum,

Please follow the below-mentioned steps to perform a dry boot on the unit and revert to us with your observation:

1. Turn off the unit.

2. Remove the battery and the AC adapter from the unit.

3. Remove all the external devices attached to the unit.

4. Remove any additional memory upgraded on the unit.

5. Press and hold the power button for 45 seconds.

6. Re-plug the AC adapter & Battery and turn on the unit. Check for the occurrence of the issue.

Cheers

Bharath

[enzo1234]

Hello !

I've already did that .

But the situation remain the same.

And i repeat that is strange , because those light codes are appearing without pressing the power button. If i connect the battery or if i connect the power supply the lights are appering as i've described on my firtst post.

I try to search on internet , but i've not found a similar light codes .

[Zoellerman]

My HP 455 G2 would not turn on, when the power button was pressed the power light by the scoket flashed orange about six tmes then flashed blue twice and went out. I went on this community help page and followed the following instructions from an HP Employee.

1. Remove power lead and anything connected tothe laptop.

2.Remove battery.

3. Press and holdpower button for 45 seconds.

4. Replace battery and power lead.

I pressed the power button and the laptop started immediately.

Thanks forthe help on this.