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I have a Sony vaio laptop model vcef44fx. It doesn't have a battery just the power cord. Has been working fine but not it won'

Tags:
  • Sony Vaio
  • Power
  • Battery
  • Laptops
  • Power Up
  • Windows 7
Last response: in Windows 7
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November 16, 2013 9:18:26 AM

Sony vaio laptop won't power up

More about : sony vaio laptop model vcef44fx battery power cord working fine

a b $ Windows 7
November 16, 2013 9:23:08 AM

Without a battery, the power regulation in the laptop is under a lot of stress.
You may have toasted it.
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a b D Laptop
a b $ Windows 7
November 16, 2013 9:33:11 AM

The power circuits are under no more stress without a battery than with. The fact is that the VAIO power circuits are simply not very robust and fail quite often. Motherboard replacement is the only option if this is the case here and is not something you can do yourself. Take the laptop to a service center for evaluation.
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a b $ Windows 7
November 16, 2013 9:34:38 AM

Does the machine have a light on it that show that the AC adapter is connected?

It may be your adapter that is fried.
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a b D Laptop
a b $ Windows 7
November 16, 2013 9:37:35 AM

himnextdoor said:
Does the machine have a light on it that show that the AC adapter is connected?

It may be your adapter that is fried.

If the power board has failed even a good AC adapter won't light the LED, thus the recommendation to take to a service center where they have the right tools for the job.

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a b $ Windows 7
November 16, 2013 10:07:38 AM

ex_bubblehead said:
The power circuits are under no more stress without a battery than with.

Of course they are. The battery acts as a buffer during high current draw. Like when the CPU is running at near max.
If the power circuit can't keep up with it, it's stressed.

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a b D Laptop
a b $ Windows 7
November 16, 2013 10:09:33 AM

AxlMyk said:
ex_bubblehead said:
The power circuits are under no more stress without a battery than with.

Of course they are. The battery acts as a buffer during high current draw. Like when the CPU is running at near max.
If the power circuit can't keep up with it, it's stressed.


Please cite your sources.
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a b $ Windows 7
November 16, 2013 10:17:39 AM

40+ years of experience with computers and digital circuits.
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a b D Laptop
a b $ Windows 7
November 16, 2013 10:20:41 AM

Mine is from talking to the VAIO engineers across the hallway. VAIO doesn't work the way you think.
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a b $ Windows 7
November 16, 2013 10:44:53 AM

ex_bubblehead said:
The fact is that the VAIO power circuits are simply not very robust and fail quite often.

Judging by this, my answer is correct.

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a b D Laptop
a b $ Windows 7
November 16, 2013 11:58:18 AM

According to the engineers, the original power board design was shot down by the bean counters as raising the cost of production by too much. The engineers wanted a separate, replaceable, board, which allowed a beefier circuit. Instead they had to redesign the circuit, cutting the margins to the bare minimum, and put it on the motherboard. Thus, the power circuits are pretty much maxed out all the time, battery in or out. And, if you haven't had a VAIO opened up, the power regulators are about as far from cooling airflow as possible and thus prone to failure from heat. This affect pretty much all VAIO laptop models.
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a b $ Windows 7
November 16, 2013 12:46:43 PM

I'm not here to argue with someone that is getting information second hand, and with 2-3 decades less practical experience than I.
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a b D Laptop
a b $ Windows 7
November 16, 2013 1:09:50 PM

Neither am I. And FYI we're of roughly the same vintage junior.
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a c 254 D Laptop
a b $ Windows 7
November 17, 2013 8:01:31 AM

AxlMyk said:
ex_bubblehead said:
The power circuits are under no more stress without a battery than with.

Of course they are. The battery acts as a buffer during high current draw. Like when the CPU is running at near max.
If the power circuit can't keep up with it, it's stressed.



Hi, for my personal information, how a battery can be use like a buffer during high current draw in a laptop.
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a b $ Windows 7
November 17, 2013 2:40:21 PM

ex_bubblehead said:
If the power board has failed even a good AC adapter won't light the LED, thus the recommendation to take to a service center where they have the right tools for the job.


Indeed.

In fact, you could just put that in your avatar and thereby obviate the need to reply at all.

My advice is, before the OP submits to daylight robbery, as you suggest he does, he should consult a site like this for useful advice.

Checking the fuse, looking at lights, trying an adapter that is rated the same as his own,trying a battery in the system, perhaps, would be useful suggestions that might establish whether a new PSU is required.

And if it was, I would advise the poster to purchase a universal adapter for a fraction of the price that Sony will charge him and thereby save him money and at the same time, validate the existence of this forum.

@ The OP,

Is there a light on the adapter?
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a b $ Windows 7
November 17, 2013 2:42:14 PM

jarotech said:
AxlMyk said:
ex_bubblehead said:
The power circuits are under no more stress without a battery than with.

Of course they are. The battery acts as a buffer during high current draw. Like when the CPU is running at near max.
If the power circuit can't keep up with it, it's stressed.



Hi, for my personal information, how a battery can be use like a buffer during high current draw in a laptop.


It doesn't, it's the other way around, the battery acts as a drain on the adapter and the system.

Removing the battery lightens the load, in fact.
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a b $ Windows 7
November 17, 2013 2:56:05 PM

AxlMyk said:

Of course they are. The battery acts as a buffer during high current draw.


This is simply incorrect.

It is quite apparent that you come from an automobile background where the battery acts as a smoothing capacitor which protects the vehicle's electrical systems.

Do you seriously think that 'charging a battery' places less of a demand on the power supply than 'not charging' a battery?
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a c 254 D Laptop
a b $ Windows 7
November 17, 2013 4:30:24 PM

himnextdoor said:
AxlMyk said:

Of course they are. The battery acts as a buffer during high current draw.


This is simply incorrect.

It is quite apparent that you come from an automobile background where the battery acts as a smoothing capacitor which protects the vehicle's electrical systems.

Do you seriously think that 'charging a battery' places less of a demand on the power supply than 'not charging' a battery?

I knew that, I just wanted to be polite to have an answer of what he knew. The charging circuit connects either the voltage of the adapter or the battery to the motherboard, but not both simultaneously.
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a b $ Windows 7
November 17, 2013 9:14:42 PM

jarotech said:
I knew that, I just wanted to be polite to have an answer of what he knew. The charging circuit connects either the voltage of the adapter or the battery to the motherboard, but not both simultaneously.


Oh, then I don't know why I was confused. :??: 

I understood Bubblehead to have said that he has it on good authority that Sony use sub-standard and by direct implication, over-priced components.

He also sort of said that the lack of a battery does not load the system.

And you disagreed with him.

I just got the impression that less informed readers than me, you and Bobblehead might get the wrong impression...

... a wrong impression that may lead to a loss of marks in an exam.

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