dropped laptop and now won't switch on. Please help

Lil306

Robinhood wrote: »

Hence asking about its state e.g. charge as this would rule out the DC jack or adaptor.

Not necessarily,

If the laptop was dropped without the power cable attached that would rule out the DC Jack.

If the laptop had it's cable in with battery charged it wouldn't because the electronics that take the power from the battery contacts could have been damaged in the drop and so it would be irrelevant running off battery

Most common problem with cables plugged in is damaged DC Jacks. Need to find out if cable was plugged in or not as I may have missed it

The fact that the laptop doesn't power up when plugged directly into mains suggest problem with

a - mains adapter (test with multimeter)
b - dc jack (not much way of testing bar taking apart and having a look)
c - damaged power circuits / circuit electronics

Options 2 and 3 can only really be checked by physically taking it apart and having a look. I personally I'm not fully aware of ways on how to test the DC Jack if it's broken, although I suspect there will be methods in this (possibly hooking up a test DC Jack and measuring the resistance through it), but that's just a hunch.

Robinhood

Lil306 wrote: »

Not necessarily,

If the laptop had it's cable in with battery charged it wouldn't because the electronics that take the power from the battery contacts could have been damaged in the drop and so it would be irrelevant running off battery

QUOTE]

Exactly the point I was making, the ELECTRONICS, not the AC adaptor or DC jack!

As far as faut diagnosis is concerned, its irrelevant as to whether it was plugged in or not. Only impact this has is that there is a greater chance of damage to the DC jack.

I think most laptops have an indicator showing if it is charging regardless of whether it is on or off. Does yours, and if so, does it light up with charger plugged in?

Lil306

You're confusing the hell out of me with your comments.

Exactly the point I was making, the ELECTRONICS, not the AC adaptor or DC jack!

As far as faut diagnosis is concerned, its irrelevant as to whether it was plugged in or not. Only impact this has is that there is a greater chance of damage to the DC jack.

Yes, but you still need to know what is broken. The most common problem when laptops are dropped is they end up with damaged jacks. I've already diagnosed the fault is related to power/electronics. I figured that out soon as I read the post. My questions are to ascertain exactly which parts are damaged.

At the end of the day, if the power circuits are kaput it has to go away for repair anyway. Which seems to be the most likely scenario, however it's worth asking questions related to the problem to get the best idea on the solution

I think most laptops have an indicator showing if it is charging regardless of whether it is on or off. Does yours, and if so, does it light up with charger plugged in?

I assume this bit is for the OP ?

Unfortunately a lit up light doesn't confirm if the other hardware inside is damaged, it just confirms at the time of use it was a working connection. I speak from experience here.

Robinhood

Lil306 wrote: »

I've already diagnosed the fault is related to power/electronics. I figured that out soon as I read the post. My questions are to ascertain exactly which parts are damaged.

That's why your first post highlighted the DC jack as being faulty and even began talking about how to repair it!

It was posts like that one which prompted me to post my message and now I find myself in this silly tit for tat squabble. It is extremely difficult to try and fault find with limited information regarding the fault e.g. flashes briefly when trying to turn on. Is this the screen or an indicator, if an indicator, which one?

As an electronics engineer I was just hinting to people not to jump to concluusions without sufficient information to support their opinions.

Lil306

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