Hello, After purchasing my GP12X I wanted to see if the luminescant display worked and it did for all about 2 secs and then it went off.However upon turning it off and then back on again some little parts on the top are visible in a very dark room but the rest is not. What type of lighting does this amp use? Is it like small UV/Blacklight bulbs or something else? Are these available on the net to buy? Or is the main board itself that houses the 12 slider controls got bulbs soldered onto it? Thanks.