Shoutbox

It's hard to tell where is the problem just looking. It could be one or more capacitores, or transistors, power regulators, transformers, ICs, so many things...
You could search on google for people with similar problems and how they solved them. If you find the schematic circuit, you can use a multimeter to check some points, maybe you can find the defective spot.
The white goo is used to glue some components, or keep them apart, or "seal" it (like sealing a trimpot, so nobody will dis-adjust it).