The information > HP Pavilion dv4000 merely means it is a Pavilion Notebook PC, and one of the dv4000 series of Notebook PC's.
The actual Product Number is on the bottom of the laptop, (Notebook), in a white Service Tag.
P/N stands for Product Number.
Not being a wise guy, just wanted you to have this information for the future.
Fortunately all of the HP Pavilion dv4000 series of Notebook PC's use the same type of Ram Memory modules, (sticks), and the same speed.
They uses DDR Sdram at 333MegaHertz. (333MHz)
Also known as PC2700
The Maximum TOTAL Amount is 2GB.
There are two ram memory slots. EACH slot has a maximum amount of 1GB.
1) Example using an HP Pavilion dv4005us Notebook PC,
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00300139&tmp_task=prodinfoCategory&lc=en&dlc=en&cc=us&lang=en&product=461723
2) Information from Crucial.com to confer,
http://www.crucial.com/store/listparts.aspx?model=Pavilion%20dv4000%20Series
A Ram Memory module for a laptop differs from a desktop.
It isn't as long, and the number of contact pins on the bottom are of a different number.
It is SO-DIMM.
Has 200 gold plated contact pins on the bottom. 100 on each side.
The Ram Memory module is about 3 inches long, whereas in comparison a ram memory module for a desktop computer that is DDR Sdram is around 5 and 1/4 inches long.
http://en.wikipedia.org/wiki/SO-DIMM
(You can click on the photo to the upper right to enlarge. You can enlarge twice more)
Be sure it is laptop ram memory you are buying.
This is the download page for the Service Manual.
With it you can see how to remove, and install ram memory in your computer.
You can also completely disassemble your laptop, if you have to, or replace any component in it,
http://h10025.www1.hp.com/ewfrf/wc/manualCategory?lc=en&dlc=en&cc=us&lang=en&docname=c00300139&product=461723&
On this page click on the blue >
HP Pavilion dv4000 Notebook PC and Compaq Presario V4000 Notebook PC - Maintenance and Service Guide
After you click it may take up to 30 seconds to see the first page. The file is downloading in the background.
It may also take additional time to download after you see the first page.
[ Took 2 seconds to see the first page, and an additional 58 seconds to fully download just now, using a medium speed DSL connection ]
If you are not familiar with PDF files.
You can use the Bookmarks menu to the left.
1) Click on the + sign next to > Removal and Replacement Procedures
2) Scroll down a little click right on > 5.7 Memory Module
You can use the blue Down Arrow at the top, and click down to Page 119
You can use the page number box at the top to the right of the blue Down Arrow.
1) Put your mouse cursor in the page number box
2) Left-click once
3) Type 119
4) Press the Enter key
One more example of Ram Memory that is SO-DIMM PC2700 for your laptop,
http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=2340128&CatId=4174
If you have questions regarding the above, please state in a Comment.
Regards,
joecoolvette
The spec of RAM used by this computer is DDR SD RAM
Maximum RAM that this computer can take is 1 GB (2 X 512 MB)
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