I was using a top loader the last 5 years or so, and I finally decided to pop open a toaster to see what a good cleaning would do. 99% of the time, you don't need a new 72 pin connector, just bend back the pins and cut the lock out chip. I have done this to 4 systems now and they work better than new, no blinking screen ever. Here is a pretty good link for getting rid of that pesky lock out.
http://www.retronintendo....amp;pa=showpage&pid=7No lock out chip means no blinking screen, its that simple. If you don't feel like doing it, I have a complete Action Set I'm looking to unload where I have already done the region mod, let me know if you want it!