Jump to content

Welcome to Geeks to Go - Register now for FREE

Geeks To Go is a helpful hub, where thousands of volunteer geeks quickly serve friendly answers and support. Check out the forums and get free advice from the experts. Register now to gain access to all of our features, it's FREE and only takes one minute. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more.

Create Account How it Works

HP Pavilion PSU or Mobo Dead

  • Please log in to reply




  • Member
  • PipPip
  • 44 posts

I have been asked to help fix a dead HP Pavllion DV4000.

The Laptop is completely dead, with the power cord disconnected when you switch on the mains the green LED on the PSU DC connector lights up bright green, but when you connect it to the Laptop the LED fades and goes out, this is the same with or without the battery connected.

With a multimeter the power output from the PSU DC jack reads 31v (which is the output stated on the PSU). However as soon as you plug it into the DC socket on the Laptop the LED goes out and the reading (if your quick) is <5v to 0v. Its as if plugging it into the Laptop is causing the PSU to cut out??

WIth the battery connected and the mains power on pressing the power butting on the Laptop does nothing.

Any ideas on how to identify what's wrong?

  • 0





  • Member
  • PipPipPipPipPipPipPipPip
  • 7,237 posts

WIth the battery connected and the mains power on pressing the power butting on the Laptop does nothing.

What immedaitely springs to my mind, is, do we know that battery is good.

Secondly it sounds as though the power supply, may be OK, when not under LOAD, but then as soon as a demand is made, it fails.
I think your first course of action is to try a good known power supply.
OR if possible charge the battery and try a good known battery.
That all said of course it may NOT be the Power supply, it could be inside the laptop.

Basicaly you are going no further I think until you try one of these suggestions
  • 0

Similar Topics

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

As Featured On:

Microsoft Yahoo BBC MSN PC Magazine Washington Post HP