Samsung Electronics Co., Ltd. Informative - Capacitor problems causing power supply to shutdown/dots on screen
There is a common problem with power supply issues in many models of flat panel Samsung TVs. Capacitors that were used are either too low a voltage, or the capacitors were of poor quality (there doesn't seem to be a consensus), and they fail prematurely. This results in either a bulging of the top or side (shown here) or a "leak" - a dark colored substance will leak out somewhere around the component.
This is a failure that Samsung appears to usually not pay to repair once a set is out of warranty, though there are cases where they have. It is worth asking them. It is a straightforward low cost ($10-15) do-it-yourself fix for those with soldering skills and awareness of safety when working on electrical appliances and electronics. A novice should not attempt the repair. A partial list of affected sets (unverified) is shown. The fixes others have done can easily be found by Googling "Samsung capacitor fix".
Typical failure symptom
More Reviews on Samsung Electronics Co., Ltd.: