Question about Samsung LN40C550 TV

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It wont power on. sometimes it will and then just shut off right away. any advice?

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Your problem is in the power supply section it could be an overheating component or defective switching MOSFET transistor or a leaky capacitor. Please don't over do, it may damage other components. An electronic service technician should handle the problem.

Posted on May 26, 2011

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My sharp R409Y*A microwave overheats after 4 min every time and shuts itself off for a few min. It will turn itself back on, but if I use it right away, it will shut itself off again quicker.


I would say your cooling ran is not running, or your vent holes are blocked, or (if equipped) a filter is blocked.

Without the cooling fan, the magnetron overheats and its TCO (thermostat) shuts down all power to the oven until it cools back down to a safe temperature, then power is restored.

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1 Answer

Shuts down


Hi,

This is a typical symptom of a failing power supply. Replace your power supply and see if the problem still persists.

Please notify me should you need any further assistance.

Best wishes,
Graemevm

Jan 06, 2012 | Intel DP55KG Motherboard

1 Answer

Tv goes on then right away a blueline across the center then goes black the power light starts blinking and stays black


It is an indication of faulty on the vertical section. Nowadays tv will automatically shuts off if you have a problem on the vertical output I.C. to protect your tube for burning the phuspor right on the middle of the screen which will affect on the picture later on.
I've adviced you to look for a qualified technician to isolate and replaced the faulty parts and do resoldering for some dry joints because sometimes dry joints damaged the parts.
Thanks for using fixya...

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1 Answer

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This is a problem with the system itself and the software within it.
Please refer to your owners manual and the 1 800 customer service number within so that they may fix the problem or ask you to return it via mail or store and they may replace the unit also depending upon your user agreements.

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Abit Kn9SLI MOTHERBOARD SHUTS DOWN ??


If you had read the manual right you would not have attempted to power up with pins 1-2 shorted out.
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RCA 32" wont turn on


It sounds like you may have a bad Horizontal Output Transistor (HOT) and/or a bad Flyback Transformer. The set is trying to start as indicated by the flashing light, but an internal fault is shutting it down right away. It could also be the Power Supply circuit. A 32in. set is not cheap to replace so it may be worth finding a repair technitian and at least getting a quote. The Flyback is the most expensive part, the others are minimal. If it is one of the above problems it could easily be repaired by a qualified technitian.

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