[jayerose]

We live in a Courtyard Villa and our front lamppost light holds three lightbulbs; only one blue is working and yes, we changed each one numerous times.

Has this happened to anyone?

[villagetinker]

Outside lights can be subject to corrosion problems, this may be why only one of three lamps are working. IMHO, you have 2 options, first would be to have the entire lamp replaced on the existing post, the other would be to have someone look at then possibility of rebuilding the existing lamp. I saw at Lowe's that had replacement parts for these type of lamps on an end cap in the fans area. I have seen the 3 lamp lights fail, one was at a neighbors. Corrosion caused the wiring to fail.

[Topspinmo]

Most likely it corrosion grounding problem.. if you do this yourself MAKE sure you trip the breaker on master that powers front porch light. It should be labeled. Verify by making sure the one light that working goes out when you trip the breaker.

[Toymeister]

I would start with a simple a cheap diy repair first.

Buy a 3/8 dowel, 220 sandpaper, and elmer's glue.

Glue a tiny bit of sandpaper on the dowel end. Trim, when dry sand the bottom contact. Take a small strip to form a small cylinder to sand the outside contact (threaded part). Finally use needle nose pliers to pull the now pushed down bottom contact.

Blow out the socket.

There is a good chance this will fix it.