cairnsy87 wrote:
> Okay my dad has an older blue toshiba a70 laptop that he basiclly junked
> a while back. It was dropped on the floor and now it wont turn on. The
> laptop is stilll in one peice and nothing is ratteling around so i
> belive the inside components are okay.
>
> The problem is with the motherboard and it now wont turn on, i think
> the motherboard might have came unplugged from the power jack but i am
> not completly sure so i dont want to take it apart yet
>
> any suggestions would be helpful.
> :Cairnsy
>
If it has been dropped on the floor, and it won't run, your alternatives are
1) Professional repair - consisting of charging several hundred for a motherboard.
Some shops charge a couple hundred "just to look at it", since disassembly
can take an hour or two, to remove the screws carefully without damaging
anything. Cables with tiny connectors are easily damaged.
2) Taking it apart yourself. Expect 20-30 screws, delicate cable assemblies
and so on. I think you'd be relatively lucky, if the only problem was
a broken power jack. Power jacks break, if a user tugs on the power cable,
while the cable is plugged in. A drop on the floor, could break something
else.
If you look at a laptop, and identify components which are heavy, or
poorly supported structurally, those may place stress on the motherboard
and break something else. So it could be things other than the main power
connector, and not all mechanical damage to a PCB can be seen with a naked
eye. You'd need an X-ray machine to see some of it. The motherboard is
multilayer, and some of the conducting layers are sandwiched inside the
PCB. PCBs are at least 4 layer in computers, and on occasion use more
layers, like 6 or even 8 layers. The layer limit is usually imposed by the
PCB thickness limits. (At work, we've done electronics PCBs that approach
0.250" thick.)
This is supposed to be a picture of an A70 power jack, and the solder points.
http://scott.sherrillmix.com/res/ima...jack_after.jpg
And this is supposed to be an A70/A75 motherboard. (You can never
be sure, with Internet pictures, whether they are correctly
identified or not.) So your motherboard could look like this.
I would have preferred to see the other side of this motherboard,
as I suspect the CPU socket is on the other side. The power jack
could be in the lower left hand corner of this photo. The body of
the jack is on the other side of the motherboard. The metal plate
above it, is a stiffener for the CPU cooling on the other side
of the motherboard.
http://getpartsonline.com/images/ebay/K000016390-a.jpg
My guess is, you'll either be junking the computer, or spending a lot
of money to fix it.
Paul
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