1. Lan lights blink. They do this to indicate the transfer of data. Its blinking more slowly because less data is going through at that particular time.
2. We are not 5, your title "and no worky" might imply you were talking to a baby and could very well explain why no one has replied to this post; they think your an ******* (and i tend to agree).
3. As for your problem, i dont understand what you mean by "I took my pc (laptop) to another pc that works ok" and you haven't given even close to enough info. Do you have a switch or router? is your network wireless? how many other PC's do you have? did you install a firewall recently? Its like trying to fix a car and all you know is that the car is blue.
What you need to do is determine what is malfunctioning first. You would do this by changing out computer/cables/etc. to find out which isn't working. For example, take a cable off of a computer that is able to connect - that cable is good - try to use it with your laptop. If that doesn't work try to connect another computer to what your laptop is usually connected to, if it works your laptop is most likely the problem. Come back after u have some info, and use the spell check and try to catch mistakes like "worky".