Here is a handy tool that lets you test electronic components like a pro. The FLIR ETS320 Thermal Electronics Tester has a 320 x 240 IR sensor to help you identify hot spots and potential points of failure. It is sensitive enough to detect temperature differences smaller than 0.06C.
The ETS320 is battery powered and wireless. It has a ±3% measurement accuracy and has 45° field of view.