Hp laptop won't boot up

Try it with only battery? Only wall-power (take out the battery)? Different power brick? If you did all 3, need to have the hardware checked, power connection, motherboard.

Thanks for taking the time to give me your best suggestions. I have tried those and still am at a loss. The motherboard is the only thing I have not tried.
I found some information to remove battery, the memory and power cord then press down the power button for 30 seconds.
Then put everything back and boot up. It worked a couple of times then the same old problem.

Thanks for taking the time to give me your best suggestions. I have tried those and still am at a loss. The motherboard is the only thing I have not tried.
I found some information to remove battery, the memory and power cord then press down the power button for 30 seconds.
Then put everything back and boot up. It worked a couple of times then the same old problem.

Thanks for taking the time to give me your best suggestions. I have tried those and still am at a loss. The motherboard is the only thing I have not tried.
I found some information to remove battery, the memory and power cord then press down the power button for 30 seconds.
Then put everything back and boot up. It worked a couple of times then the same old problem.

Best answer selected by red_streak.