Please advise on troubleshooting my connection

[ZohnoReecho]

It could depend on various factors.
Your PC may have an N WiFi while PS3 only uses B/G.
Where your PS3 is there could be other WiFis creating conflicts.
PS3's WiFi hardware might just be bad.

wireless can sometimes cause issues. There is so much 2.4ghz noise in the air, that its easy for issues to arise.

It is possible a neighbor got a new router and is on the same or close channel as you. Try changing the channel your broadcasting on. 6 and 11 are usually defaults. So being on 4, 7,8 are often the best.

You can use a program like http://www.metageek.net/products/inssider/ to scan to see what channels are . and then pick the best option.

He would need something to use on PS3.
If you have an Android you can use https://play.google.com/store/apps/d....wifi.analyzer to check channels around your PS3. Maybe for iOS there is a similar app.