Here are excellent instructions for upgrading memory on HP Pavilion zv5000 series laptops in seven relatively easy steps. I found links to the disassembly pictures while reading comments on Ask Laptop Freak site and decided to compile them into a guide. Upgrading memory on this laptop could be tricky because one of the memory expansion slots is located under the keyboard. According to HP specifications for zv5000 you can install 2 memory modules up to 1GB each. You should use PC2700 333MHz memory modules.
STEP 1.
First of all, you can add one memory module into the expansion slot on the bottom of the laptop.
STEP 2.
Remove seven screws pointed with red arrows.
STEP 3.
Carefully lift up the keyboard cover. You’ll have play with the cover in order to release plastic latches.

Enlarge image 3.
STEP 4.
Remove four screws securing the keyboard.
STEP 5.
Carefully lift up the keyboard. You don’t have to disconnect the keyboard from the motherboard in order to access the memory expansion slot. Just turn the keyboard over and place it upside down on the palm rest.

Enlarge image 5.
STEP 6.
Here’s the memory slot you are looking for.

Enlarge image 6.
STEP 7.
Spread latches on both sides of the memory module and remove the old 256MB module and install a new one.
HP Pavilion zv5000 laptops will not take more then 2GB (1GB module in each slot).

Enlarge image 7.
UPDATE: HP Pavilion zv5000 LCD removal and backlight replacement instructions
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August 16th, 2010 at 1:06 pm
I did as you said and it works GREAT!!!! I’m very happy!!!
Thanks; Steve.
August 14th, 2010 at 12:13 pm
Steve,
Download touchpad software/driver from HP website. It should fix the problem.
August 10th, 2010 at 6:11 pm
I had some work done on my HP pavilion zv5000, it works fine but I noticed the scroll on the touchpad doesn’t work, it moves the pointer. I went to control panel, then mouse ,but didn’t find anything about the touchpad. I’m running windows XP. I know very little about computers.
What do you think?
Thanks; Steve.
July 30th, 2010 at 9:46 am
Thank for your guide and instructions, this was a big help.
July 27th, 2010 at 2:39 pm
I wish a would have known of this guide earlier. Thanks a lot it really helps
July 27th, 2010 at 11:46 am
Thanks very much the second strip was well hidden, with your instruction, a piece of cake!
April 27th, 2010 at 9:27 am
tan thai,
Download this user manual for Sony Vaio VGN-CR series notebooks. The memory removal, replacement, upgrade instructions could be found on the page 116.
April 26th, 2010 at 1:40 pm
how to upgrade the memory sony vaio vgn-cr320e/p?can you help me