I already have the password, but every time I try to go on, it always says that a connection error has occurred. The attempt to obtain the IP address timed out. Even though the signal is 100 percent. What should I do?

Upgrade to the latest firmware. I had the same problem before, but when I upgraded, the connection process went smoothly.

Try the new PSP Go, it has better connection and has good hardware preview from major gaming publications.