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VGN-S46SP sony notebook cannot power up

Posted on 2008-10-16
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Last Modified: 2013-12-11
Hi,

I have a sony VGN-S46GP notebook. When I press the power button, it refuses to power up. No sound. No light. Nothing.

I am very sure that:
- My notebook battery is in good working condition. I tried the battery on another sony notebook.
- My AC adaptor is working too.
- There is current on my motherboard when the power supply is available. ( does it mean it is still in good condition?)

I've browsed a dozen of websites related to sony notebook repair but I cannot determine the cause of my problem.

I suspect the tiny cable connecting the power button to the motherboard is spoilt but i have no way to test it out.

Pls advise.
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Question by:dandeliondream
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Expert Comment

by:nobus
ID: 22738244
try this first :
remove AC and adapter
hold power button for 20 sec
now install power and reboot
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by:nobus
ID: 22738249
for checking the power button, you must open the notebook, and in most cases, it's just a micro-switch, mounted on the board - no wires
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by:dandeliondream
ID: 22738687
where is the micro switch?
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by:nobus
ID: 22738959
it IS the power -on button :-)     :=))    :-)
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by:Mark
ID: 22742992
Here is the service manual for the VGN-S series. If you suspect the power button is not connected properly you will need to reseat the connector. This guide will show you how. The pertinent part is the PALMREST section, but you will need to remove other parts like the keyboard first to access these connectors.
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Mark earned 250 total points
ID: 22742999
Sorry here is the link to the service manual
http://home.comcast.net/~nw_systems/vgnS.pdf
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by:dandeliondream
ID: 22787549
hmmm...I've tried reseating the connector but it's not working. i also tried to install the good micro switch to the malfunctioned notebook but it's still not working...any idea what else can i do?
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by:nobus
ID: 22787988
you can verify if power is reaching the notebook.
any lights if you connect /disconnect battery, or AC power?
>>   My AC adaptor is working too.   <<  did you test it on another ;laptop ?
 
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by:dandeliondream
ID: 22857658
it's still not working. I suspect the motherboard is spoilt but how do i know?
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by:Mark
ID: 22857764
The only way to know is to replace the motherboard.
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by:nobus
ID: 22857767
or the cpu..
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by:Mark
ID: 22857774
Even without a CPU it should still indicate something, an LED for power at least.
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Expert Comment

by:PUNKY
ID: 22857863
Get new system :o)
Replacement could cost more than buy new one.
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by:dandeliondream
ID: 23025161
Hi rindi,

sorry for the late reply. My problem is not solved so i didn't grade the comments. My notebook is still lying in my storeroom cabinet.
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Assisted Solution

by:nobus
nobus earned 250 total points
ID: 23029358
replacing the mobo or cpu is something you have to do, we can't...
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