VIEWSONIC N4285P | LCD TV
SYMPTOMS: Set turns itself on and off.
DIAGNOSIS: When a TV does weird things power wise, what do you think should be the culprit? The power supply! Check for bulging capacitors and output voltages. If anything seems off, the PSU is probably shot.
SOLUTION: Order new PSU and replace it. If you are unsure about things (as DIY repairmen often are), just replace the whole PSU. I do the same thing for efficiency reasons and because it's sometimes difficult to find a short if you don't have a schematic. The TV is still working great after many months with its new PSU!
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