Question about Toshiba Satellite M105 Notebook

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My toshiba cannot power up. i think a transistor

My toshiba cannot power up. i think a transistor is burned can there be a replacement

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From what you're saying it sounds like a bad motherboard but your description is very brief. Please elaborate.

Posted on Feb 20, 2009

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Basically it is telling you that the inverter is bad. You can disconnect the output so there is only the power going to the inverter and see if it will come on with a no load situation but if it still fails, there is no fix other than to send it back to manufacturer.
Try this as your one and only "maybe":
Reset is press CLR and WRT at same time (I think).
Page 7-7 and 7-8
http://www.toshiba.com/ind/data/tag_files/G2%20Manual_559.pdf

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Check and replace flyback transformer. If flyback transformer is faulty, line output transistor will overheat and will fail.

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The tv keeps turning itself off and on. It is a Toshiba 46HM94P


Probably a lose connection, Cold soldered, Power supply need to replace or check some parts are already defective like capacitor and resistors that change value or your horizontal out circuit have problem on the out stage like the transistor and capacitors or burned resistors. Send me picture then I'll instruct you where can you find them

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If F801 blew off then check standby power supply section and if F860 blew off on pressing power button then check inverter transistor (power out) on power supply board.

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replace the busted transistor in your ECU. For Bosch 30011 or 30014 you can use BU323Z transistor for replacement. it´s 100% pin-compatible and released for transistor ignition systems.

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Power transitor for 17ince dell monitor


purchase new transistor of original company duplicate transistor may heat and burn solder the capacitor of same value solder fuse and better to work on series lamp protect from burning if transistor burn again then check zener and replace if faulty

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Sansui amp au11000


Without seeing the amp nor having the service manual in front of me, it sounds like you have a severe offset problem. There is either an open resistor or transistor in the early stages. With the output transistors removed from the unit, look around at voltage levels to determine where the fault is. I will try to locate the service manual. Can you post the parts that you have replaced?

Thanks,
Dan

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1 Answer

NAD C350


Take a ohm meter and measure resistance from emiter to collector should have a few kilo ohm on output transistor.
If no ohm meter available , remove output transistors from circuit.
note position of transistor . you have a NPN and a PNP for each channel.
Replace fuse and power up. If fuse blows check bridge in the power supply.

80% of the time output transistor burn and blow the fuse.
before replacing output transistors check driver transistors they probably burnt also

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1 Answer

BROKEN LCD... BURNED TRANSISTOR


better bring it to the toshiba service center

Apr 10, 2008 | Toshiba Satellite M105 Notebook

1 Answer

No picture, just went off while watching tv


The pink lines in the set happened when the first time it blew out. It is called a burn in on the inside surface of the picture tubes. Not the fault of the TV repair guy. This is the fault of Toshiba. This set has known to have this happen and you should contact toshiba and request that they replace all three tubes for you at no cost. You should also stop using these repair guys who cannot fix a simple vertical problem. Find out who is authorized for Toshiba in your area and call them. They will know, or should know the problems that happens with this model number and take care of them once and for all. Good Luck

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