Laptop will not power up

[AStatie]

Hi there,

i have an HP DV4-2045dx laptop running Windows 7, bought a little over 2 years ago. A few weeks ago, the notebook gave a power alert saying that the battery was drained and then shut down. The computer was plugged in and so i thought the power adapter had gone bad. I bought a new power adapter, but the computer just turned on and then shut down immediately afterwards, stating it had no power. So my second conclusion was that it was the battery, and i bought a replacement battery. I plugged in the replacement battery, turned it on and everything worked, but after some time i noticed again that it was running on battery even when plugged in. Sure enough, after some time the battery was drained and the laptop shut down again.

At this point i am ruling out battery and adapter, because a friend of mine has the same type of laptop and i've tried both components on his laptop, and they work. Can it possibly be that the internal power supply failed, and if so, is it replaceable ?

Any help is appreciated

[ManjunathTech]

Hi

Please find the web link given below might be helpful for you to resolve the issue.

Testing and Using the AC Power Adapter

Please note incase there is no light next to the Ac Adapter Pin then this could be the issue with the Adapter and you need to replace the Brick.

[erico]

There is no internal power supply per se. There is a charging circuit on the system board. To replace it you have to replace the system board.

Have you tried removing the battery and plugging in the power adapter and then pressing the power button to see if it will boot into Windows? Use a power adapter that you know worked on your frind's notebook.

 If it does not work at first ,try wiggling the powe adapter connector at the notebook end. Do it gently. You may find that when you wiggle the connector the notebook tries to power up.