|Compaq Presario CQ61 is a series of computers, not a specfic model|
Scroll down a bit.
Find the similar label on the outside of the case.
- the specific model number - is at the end of the first line
- the Product Number - p/n - is on the third line
If you use the Product Number to search with on the HP site, don't use the # and the characters after it at the end of the number to search with.
The Maintenance manual for your series is easily to find on the HP web site....