upgrading memory on old HP pavilion dv4000

[EmperorNortonI]

My friend bought a used laptop last year that has been running very slow. She asked me to fix it and I found out she's running Windows 7 on an old HP pavilion dv4250us with only 512 MB of ram. Obviously it needs more memory to run Windows 7 smoothly. I'm not sure if it's worth trying to find memory for this old laptop or going back to Windows XP. She can't afford anything too expensive (otherwise she'd just get a new laptop).

I found this: http://www.memorystock.com/memory/HewlettPackardPaviliondv4250us.html
which looks pretty reasonable. I'm guessing 2 1 GB sticks will do the trick.

I'm not really sure how to change the memory in this laptop, but I managed to snap a picture of the memory after I opened it up and was hoping one of you guys can give me some tips and let me know if it's worth the effort.

 

[fireberd]

Here is the listing from Crucial Memory. It can be upgraded to 2GB according to Crucial.

Computer memory upgrades for HP - Compaq Pavilion dv4250us Laptop/Notebook from Crucial.com

 

[EmperorNortonI]

I had some memory from another broken laptop lying around. 512 MB sticks. I can't get them to fit though. Are they two different types of chips? They look the same, but it looks like the ones I'm trying to put in are DDR and the originals are DDR2. Are these compatible?

The ones on the right are the original sticks that came in the laptop. The ones on the left are the ones I'm trying to fit into the slots.

 

[bobkn]

I had some memory from another broken laptop lying around. 512 MB sticks. I can't get them to fit though. Are they two different types of chips? They look the same, but it looks like the ones I'm trying to put in are DDR and the originals are DDR2. Are these compatible?

The ones on the right are the original sticks that came in the laptop. The ones on the left are the ones I'm trying to fit into the slots.

http://en.wikipedia.org/wiki/Sodimm

Nope.

The slots in the DDR and DDR2 SODIMMs are in slightly different locations.

The electrical requirements are very different as well.

Stay with the 2X1GB DDR2.