Question about Orion STV2763 27" TV

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TV goes on and off.

I have an Orion STV2750 27" TV. Manufacture date March 2001. It was working fine, then just shut off. After about 10/15 minutes it will turn back on. Stays on about 5 minutes,then shuts off again. Is this an easy, inexpensive fix? Can you help me with this?

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Hi,

Based on your description, it would appear to be a case of cold solder issue (most likely) or heat related (just a possibility) or both interrelated.

Repairs wold require the application of a low wattage soldering iron at the determine cold solder joints. They can be determined by checking for those that are dull grayish in color as compared to the regular/good bright silvery. Should you not be able to determine the exact cold solder joint, a shotgun approach would also do. This is re-soldering most of the major joints with particular attention to the power devices such as the bridge diode, regulator IC, chopper transformer, capacitors in the power supply; the vertical IC; the flyback transformer pins and the Horizontal out. Often, the major joints would be bigger than the regular solder joints.

The above of course requires familiarity with electronic circuitry and components, use of a soldering iron and perhaps even a DVM. Should you be uncomfortable, then perhaps your best bet wold be to seek the services of a qualified professional.

Hope this be of initial help/idea. Pls post back on the model number how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FixYa.

Additional information:
cold solder issues - each component is soldered into small holes on the printed circuit board which in turn connects said component to the other components. Due to time, heat, use, some solder joints would be cracked or loose. It is possible that the cold solder is still minimally connected (hanging by a thread). When the TV turns on heat would be generated which would be sufficient to further loosen up the solder joint to the point it no longer provides electrical contact. Jarring the unit creates movement inside enough to re establish the contact, sometime good enough sometimes not enough.

Again, since the unit still operates (sometimes) then it is highly probable that there are no defective components. As you have posted on then off then on, it is possibly a loose connection, solder joints are "connections" except that molten soldering lead is used to attach/connect the component to the board, "loose connection" in this sense is equal to "cold solder".

This might be of help to you.
TV goes on and off. - 7aacfc0.jpg

Posted on Jul 06, 2008

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