Question about Toshiba CF30F40 30" TV

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TV is dead

Lightning may have damaged television. I am hoping that there might be a fuse that can be reset. Can the television be reset?

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I have the same problem and the tv is dead. A friend says that it is the internal power supply. The tV has two and one was blown and so it must be replaced

Posted on Dec 17, 2008

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After a lightning storm, my TV will not turn on. Is there a fuse or something on the in coming power that may have blown causing it not to turn on?


Any TV subjected to a power surge will have problems. If you can remove the back cover, do so. Locate the glass fuse. In the best situations the fuse is clear and opened, and replacement will repair your TV. In worst cases the fuse may be blackened, and you will see that many components are burned and shattered. If this latter is true, only replacing the TV is your best bet. In many cases electronics may be connected to surge protectors, but lightning will over ride these devices and cause damage. I have seen this happen many times.Thanks for asking and show all hands of support!

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A lightning storm will destroy a TV in many cases. I have repaired very few, with this problem. I would certainly find a new TV, if this is the case for sure. Thanks for asking!

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The sound could have come from one of your power capacitors. You could tell if one of them is no longer operational by looking at them; they will be burned, or blistered, or will be bulging. If this is a CRT type of TV ensure that you only look inside if you are fully aware of how to deal with the lethal voltages that are stored on the inside of the unit.

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Look for burned PC board traces on the bottom of the main board. With lightning/surges it could be a wide variety of things. You're probably doing the right thing in looking for a main board however it's probably going to cost you more than the set is worth to go that route........even if parts are available.

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Lightning Strike?


Assuming this line is across the screen horizontally (side to side), this means the vertical deflection circuitry is dead. In late model sets, there is a Integrated circuit package which drives the vertical yoke coils. Possible defects: the I.C. itself, bad solder connections where it solders to the board, missing voltage source to this I.C. (often around +24 volts), or a bad electrolytic capacitor in the associated circuitry. This latter often results in a non-linear picture, or less than full deflection condition, rather than a thin line only. It is possible lightning caused this problem, (I've seen some rather illogical damage from lightning ) perhaps it produced enough of a surge to pop the I.C. or a fusible resistor in that voltage source noted above.

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1 Answer

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there will be a fuse inside, check it. aside from that it could be anything, lightning is unpredictable

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1 Answer

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Lightning will create a lot more damage,the vertical circuit has become defective,the repair should not be expensive better be safe and call a qualified technician.

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