Upgrade processor

[rdynac]

Hello, I would like to know if I can replace my CPU in my laptop. I have a HP 655 Notebook PC.

[Huffer]

Here is the Manual:

Service Manual

Here is what it says about your question:

Processor is soldered to the system board

So, in a nutshell you cannot replace the CPU without also replacing the motherboard. And, to be honest all three optional processors for that model are very low-end weak AMD processors, any one of which is no faster than the processor in a good cell phone. 

I hope that laptop was not expensive. I am sure you are suffering from poor performance. I usually have more help to offer but in your case you have to think in terms of a new laptop.