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Sony STR-D990

I have an older Sony STR-D990 A/V Receiver that still works good but after it has warmed up for 15 minutes all the background lighting goes out and I can't see the station call letters or any of the settings. Just wondering if anyone has an image of what these machines look like inside and where to look for a possible problem



Sony STR-D990

You have a florescent display tube in that receiver. There could be bad connections on the pins of the tube (look for about 25-30 pins). When you resolder them make certain you don't make any solder bridges. Could be other bad connections on that board, including the filament supply--this is an AC supply from the power supply board, so there could be a problem there also. Loss of a DC voltage can also make the display disappear also, but the problem many times is bad connections on the display board.

Sony STR-D990

Thanks for the reply........I appreciate the information and will concentrate on the flourescent tube area.