I just had YLOD (yellow light of death) and repaired it myself. It worked all well but my PSN cannot connect anymore.
I tested my connection - Internet connection successful - IP successful - PSN Failure.
Anybody can help me with this misery?
Welcome to the forum.
Congrats on fixing the YLOD on your own. Savvy! As far as the PSN goes, it may have just been undergoing maintenance when you tried to get back on... is this still happening for you?
If it is still happening to you it is possible that you disconnected the ethernet from the board somehow while reflowing.