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Sony Vaio dead not powering up


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#1
stanna

stanna

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Hi gang

Got a Sony Vaio PCG-7185m around 18months old.

Power light comes on as does charge lightg but pressing power switch produces nothing. No more lights no hd activity no fan nothing at all.

Power supply is fine but nothing happens.

Could it be purely down to the fan being broken?

Comes apart easily but not sure how to proceed?

Any help please?
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#2
stanna

stanna

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Just an update

Left it charging overnight and batt appears charged as led has gone off.
Power led is permanantley lit but nothing.
Take out battery power led off press power button led lights battery led flashes but nothing.
Power led remains lit until battery removal.

Very odd!
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#3
Digerati

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Sadly, notebooks are very proprietary which makes troubleshooting by the user very difficult as simply opening the case for inspection can be a real challenge, even for the experienced. It sounds like to me that something is wrong with the motherboard, or the notebook's power circuits. Sadly, there's no way for normal users to test them. So, outside of check to ensure the RAM and any accessible cable connections are tight and securely fastened, it looks like it needs to go into a shop. Sorry.
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#4
stanna

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Thanks for response


Ive had the MB out. This lappy is very easy to open.
just cant see anything wrong???
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#5
Digerati

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just cant see anything wrong???

And that's why electronic technicians have multimeters, o'scopes, test mock-ups, signal generators, schematics, and tech manuals - because typically, there is no visible evidence. You can sniff around for burnt smells, you can inspect for leaky or bulging capacitors, or tiny cracks or scratches, and you can ensure all cables are in good condition and connected properly. Beyond there, troubleshooting sophisticated electronics is beyond the scope of normal users.

And sadly, even a well equipped shop with highly trained technicians are pretty much helpless without tech data that shows what voltages and signals (waveforms) should be seen at this or that test point. And with 1000s of motherboards out there, it is impossible for even the bigger shops to maintain tech data on all. We can swap in RAM, CPUs, and test the motherboard out of the case. Even with the applicable tech data, troubleshooting can take time, and then you have to get the parts. This whole process can easily take 1, 2 or more labor hours to accomplish - which quickly takes labor costs to the point fixing the notebook is not worth the cost.

Sorry, I have nothing for you, but taking it to a shop, but I fear they will say the same thing. New motherboard time, or new notebook time.
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