Ours broke about a month ago.
I called Sony and had to give them the serial number and the model number and tell them where I lived. They gave me a Repair Authorization # and told me where to ship it to and exactly what to write on the letter. I had to send it to Farmington Hills, which is about an hour and a half from here.
The repair was free and I also received a new 90 day warranty.
I had it back within 10 days, good as new!
Do you still have all of the information that came with the PS2?
Let me know if you need any phone numbers for Sony.
I wanted to add, the tech on the phone ran a diagnostic test on the PS2 while I was on the phone but could not determine what was wrong.