Notebook won't power On

[Marty19461964]

Machine was extreamly slow.

Replaced AC Adapter, Proved to be not working.

Opened Machine to reseat RAM.

Was not like any I Have worked on before.

Couldn't find the memery stick.

Now the Machine will not Power On.

What NOW?

Thank You

Marty[edit]

[Jeet_singh]

@Marty19461964,

Thank you for showing your interest in HP Support Forums. It is a great place to find the help you need, from other users, HP experts, and other support personnel. I read your post that you have an HP Pavilion notebook and you are having issues with booting the PC to the desktop. No worries, I'll be glad to help you.

To provide you with an accurate solution, I'll need a few more details:

Have you recently made any software or hardware changes on the PC before the issue started?

Did you try to do a Hard reset on the notebook?

Are you using the original charger that came with the PC? Have you tried to connect the laptop to a different wall outlet.

Does the laptop shutdown right away if the charger is disconnected from the laptop?

In the meantime, let's try these steps here: 

Perform a Hard reset on the notebook: 

Many startup errors and other problems can be resolved by decreasing the amount of power stored in hardware components. Decreasing stored power is sometimes referred to as a "Hard Reset". Use the following steps to perform a hard reset on a computer:

1. If Windows is open, click Start and then Shutdown.

If Windows is not open and the computer has power, press and hold the power button on the computer until the computer shuts off.

2. With the power off, disconnect the power cord from the back of the computer.

3. With the power off and the power cord disconnected, press the power button on the computer for 5 seconds. The power light indicator on or near the power button might turn on briefly but then go out.

4. Reconnect the power cord and turn on the power.

Next thing, I would suggest here is to follow the steps suggested in the support document for - HP Notebook PCs - Computer Does Not Start (Windows 10)

Could you please respond to this post with the details as well as with the results of the troubleshooting as this will help me in further assisting you.

Eagerly waiting for your response!

that said, If the information I've provided was helpful, 

give us some reinforcement by clicking the solution and kudos buttons, 

that'll help us and others see that we've got the answers!

Good Luck.