> Otherwise, probing around thepowerjack should indicate if
> it's shorting something it shouldn't, though when they are
> loose it tends to be visually obvious. * A link to a really
> high resolution picture(s) of the laptop mainboard might
> help.

I did the probing and it looks fine. I will try to get a picture soon
of
the laptop motherboard. Thanks for your aid and time

On Oct 15, 11:32*am, s <s...@mailinator.com> wrote:
> So, my mistake was gross negligence in plugging my adapter into the
> wall outlet instead of using asurgeprotector?

If a destructive surge occured, then why is your AC power supply
(adaptor) still working? To say why failure happened, first identify
what is damaged. Sounds like the best you will conclude is a
motherboard defect. Almost all defects have no visible indication.
In the other newsgroup where your post is duplicated, Christopher
accurately described how power is distributed on the motherboard. To
trace this 'no power' fault on the motherboard, use facts that
Christopher provided.

Let's see. You connected that computer to 120 VAC power. If
voltage goes higher, then other household appliances and light bulbs
get damaged. But your computer is rated to work just perfectly even
when AC mains are 240 volts. If excessive voltage (a surge) harmed a
240 volt computer, then why are all those other "only 120 volt"
appliances working just fine?

Most likely reason for failure is something mechanical or a
manufacturing defect inside some component. Such failures rarely
leave any visual indication.

On Wed, 15 Oct 2008 08:32:12 -0700 (PDT), s
<s@mailinator.com> wrote:


>How do I unplug the LCD inverter board? I have never opened a laptop
>monitor before?

There will be at least leads to the CCFL lighting which you
can trace back to the inverter board and unplug, and a cable
for the screen itself (and maybe for a wifi antenna). Just
follow the leads and unplug the right one. You should be
able to tell the antenna lead from inverter board as it goes
to the NIC, and the screen cable is typically a (mylar?)
ribbon.


>
>> Proceed to unplug as many other things as possible, and
>> lastly also try taking the processor out although if you
>> take the heatsink off you will need to clean off the
>> original thermal interface material and put fresh thermal
>> compound on before remounting the heatsink later.
>
>Unlikely I can do it with my limited knowledge and more difficult
>is finding the proper thermal compound(although I don't know even
>which compound you are alluding to). I know lot less than the average
>laptop
>user in such matters.

If you have a mom-n-pop tv/electronics repair shop around,
that might be your best option to "hope" for an affordable
repair - or at least only a small bench fee to be told it
won't be an affordable repair, so that is a roughly $50 to
$100 gamble on what is wrong and if it's cost effective to
fix it. While many places cringe at the idea of a piece of
equipment the customer has dismantled, you might want to
take it to them already in the open state you have it so
they don't have to dismantle it themselves.

If it's more than a cheap discrete component replacement it
is probably not worth repairing at this point, a repair more
invovled than that could easily be over $180 while the
laptop itself is near end of average life at the 5 year
point, could easily need new CCFL tubes and hard drive, have
other typical wear, etc.



>I could not gather a multimeter, but feel if my adapter can
>power my friends laptop(whose battery was removed) it is working fine
>like my battery(which could also power my friends machine which was
>disconnected from the AC adapter).

Yes, it does seem you have ruled out the AC adapter and
battery.


>> Yes,powersurge damage can be subtle and a system can keep
>> working fine only to fail later.
>
>So, my mistake was gross negligence in plugging my adapter into the
>wall outlet instead of using a surge protector?

Not necessarily, yes a surge protector is a good idea but
whether that is the route the surge came in on is another
matter, and some surge protectors aren't quite comprehensive
protection. You could even be the unlucky one in a million
who just happened to have their laptop fail right after a
power outtage, if it were new I'd think it unlikely but at 5
years old the likelihood of a failure goes up every day.


Or could the age
>also have compounded the problem. I have seen such
>outages before, but this is the one which has
>left my machine in such a state. The earlier ones
>did not seem to affect it.
>
>Thanks for your reply and suggestions.

I'm still leaning towards my prior suggestion if you can't
find the fault yourself - sell it whole or part it out to
recoup some of the loss to apply towards a new laptop.