HVAC Mystery?!!? Help

Ok so I have two climate control units...the original works great but I spray painted it black and totally jacked it up. Then my I found another one that came with blue buttons! The only problem is only one works, the far right one is out. So I tried putting one of my original bulbs in the new control but it still won't light up. I tried the same bulbs in the orignal and they do work! Plus I thought it was the bulbs changing the color of the button lights but when i put the blue bulbs in my orignal climate control they lit up amber??!! I am totally confused, any ideas?

 

Then how do you know that one is really blue?

 

You can't change the color easily. The color comes for the color of the plastic buttons.

 

Well that's what I'm trying to figure out. I assumed they were blue because they lit up blue. But once I changed them to old hvac they became amber. I guess the previous owner changed plastic color as Trap mentioned. Anyways I am still stuck with one light not functioning any clues? It's obviously not the light bulbs.

 

Check if any solders were made? Has it worked before?

 

no that button has never worked before...If it is a soldering job how can I tell if the led is burnt out?

 

thanks mycal50 ill check that out