How to fix HP Pavilion dv9000

A) Power On switch is no good.
Power On switch is usually on a Power Button Board.

B) AC adapter (Charger) could be bad. Hasn't charged Battery either, so there is NO power going to the laptop.

AC adapter needs to be checked for output voltage.
It's DC output voltage, and voltage depends on laptop. Usually 15 Volts to 19.
If the laptop manufacturer name, and model number was stated, I could tell you.

C) DC Power Jack problems.
The DC Power Jack is the jack on the laptop (DC_IN), that the AC adapter plugs into.

DC Power Jack either is soldered directly to the motherboard, or has wires attached that end in a small male plug. Unplugs from motherboard to remove, plugs back in to install.

D) Bad Power MOSFET's on the motherboard.
Example using HP Pavilion dv6000 series, and Pavilion dv9000 series Notebook PC's,

http://mayohardware.blogspot.com/2010/04/important-parts-on-dv6000-and-dv9000.html

The Fairchild Semiconductor Industries - FDS6679 - Power MOSFET is obsolete.
Cross reference example is FDS6679AZ.
Price is $1.01 USD,

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/FDS6679AZ/?qs=sGAEpiMZZMshyDBzk1%2fWi1qxDdW%2fXBi2qgMuZEfLVO4%3d

Alpha & Omega LTD - AO4407 is also obsolete. Cross reference example is 78 Cents USD.

http://www.youtube.com/watch?v=3NN7UGWYmBY

http://www.youtube.com/watch?v=5uiroWBkdFY

Post the manufacturer name and model number.
Model number can be found on bottom of laptop.

I ha-te giving generic one-size-fits-all information.

Post back in a Comment.
Regards,
joecoolvette

It sounds like your power supply is not charging the battery and the battery is dead (enough to try to turn on, but not more than that).
check the power adapter output with a volt meter.
Make sure the battery charge light is on when the power adapter is connected.
if all looks good there, try removing the battery and turning the unit on while plugged in.
if none of these work, post a reply here to this solution.

For the HP Pavilion dv9000, this is the power adapter:
http://cgi.ebay.com/90W-HP-Pavilion-Laptop-AC-charger-AdapterDV6000-DV9000-/120665361457?pt=Laptops_Nov05&hash=item1c18374c31

For the HP Pavilion dv9417ca, here is the power adapter:
http://cgi.ebay.com/HP-PAVILION-DV9417CA-LAPTOP-ADAPTER-BATTERY-CHARGER-90W-/260578065208?pt=Laptop_Adapters_Chargers&hash=item3caba9bb38

u better remove ur ram and reinsert in slot if you have two rams in mother board please take out one ram from one slot and check if it same take out another ram from slot and check it

just see it from http://www.udtek.com/hp-pavilion-dv9000-ac-adapter-90w-185v-49a-p-2970.html.may this is good for you.

Laptop batteries will usually last from 1.5 to 5 hours, depending upon the demand, the battery and the use. Sound burns up a lot of juice as does the DVD player so if you're watching movies or playing games an hour is about right. You can purchase a better HP PAVILION DV9000 Battery with 12 cell , it will work longger.
detail: http://www.battery-center.net/hp-pavilion-dv9000-battery.html

It's either the motherboard or the power supply.

I'd start with testing the power supply. If you've got a multi-meter great. Just measure the voltage and see if it fluctuates.

If not, check with a local repair shop to see if they have a power adapter they could use to test with.

Possibly a power issue? Try booting up with the power supply connected; you can even start up without the battery power connected to the computer, just the ac power supply. It could be a battery issue...hope you find a solution soon.

If you tried it witht he adapter then sounds like the motherboard is dead.