Solved laptop won't turn on

Lenovo G460 laptop computer - 06779xu...
April 18, 2017 at 13:49:44
Specs: Win 7 Home Premium, 2.16/3G
My laptop has a light on the start button, but when I push that button, nothing happens. I have unplugged, removed battery, and held down start button for 1 minute, but did not help. Any suggestions? thanks,

vandal67


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✔ Best Answer
April 20, 2017 at 16:40:04
When you've tested with a known good power adapter let us know what the result was (please).

Remember the test adapter must be correct voltage and provide the same or higher current output that your present adapter has. Also the the polarity of the centre "pin" must be the same as your present adapter.

Any competent techie at a decent store will know that anyway (or ought to).



#1
April 18, 2017 at 16:28:56
Remove the battery, plug it in and try to start it. If it starts with the power cord without the battery then the battery is bad (shorted). If it still does not start then it MIGHT be that the battery is not charging either due to a bad cord or bad charging/power board in laptop.
Still, it might be something completely unrelated... Have you had any prior problems with the laptop recently? This information may be important to diagnosing it.

You have to be a little bit crazy to keep you from going insane.


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#2
April 18, 2017 at 18:27:54
Plugged in without battery still wouldn't start. No prior issues.

vandal67


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#3
April 19, 2017 at 05:17:55
Even though the start button may be lit/illuminated it doesn't necessarily mean the power in from the mains adapter is OK...

Per chance can you borrow another known to be good (compatible) adapter and test the laptop that way?

Equally checking the volts out from the adapter - with a volt meter - may not be enough to show if it's OK or not. Often power supplies (the adapter is just a mini power supply) may not produce adequate output when under load (connected to the laptop).

Incidentally this seems to a not infrequent event with several versions of Lenovo laptops...


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Related Solutions

#4
April 19, 2017 at 07:01:09
Please answer the question in the last line of #1

Sorry realised later it had been answered in #2.

Always pop back and let us know the outcome - thanks

message edited by Derek


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#5
April 19, 2017 at 16:28:27
Without prior problems I can see the primary culprits are the power adapter or the power board in the laptop. As mentioned try an adapter if you can borrow one from another similar model laptop or see if a local computer store will let you try it with one of their adapters to prove if you need to purchase a new one.
Note: if this machine is still under warranty pack it up and take or send it to an authorized dealer.
If you had any prior problems (running, starting, quitting, shutting down, freezing, etc.) then we might have other avenues to explore.

You have to be a little bit crazy to keep you from going insane.


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#6
April 19, 2017 at 16:43:04
I have seen references to a problem with that on/off button on some Lenovos; but can't remember if the problem button was illuminated or not when the laptop failed to start... But first test with a known good mains/power adapter (test with and without the battery installed too).

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#7
April 19, 2017 at 17:54:58
Couple things. 1st, thanks for all the suggestions. 2nd, I have an Asus laptop. I thought I had changed brand name when I entered this question, but guess not, 3rd, I left the laptop unplugged last nite, with battery still in, but no lights showing. Just now I looked at it, the start button light was back on, and also green lights on front edge of laptop under the picture of the light bulb, under the pic of the wi-fi, and under the pic of a lock with a number 1 on it. I re-plugged back in, but still won't start. Wondering if new info gives any better insight to the problem? thanks again

vandal67


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#8
April 20, 2017 at 01:35:00
Even with all the lights on it could still be the power adapter... As suggested already, test that possibilty either by borrowing one appropriate/compatoble from a chum/friend; or visit a local store and to check using one of theirs, as if it is the power adapter then likely you'll buy one from them?

Test both ways - with the battery installed and without the battery installed.


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#9
April 20, 2017 at 15:10:43
By power adapter, do u mean power cord?

vandal67


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#10
April 20, 2017 at 15:54:21
The power adapter is "usually" something like a rectangular block with a cable (usually) permanently attached which plugs into the laptop. there is also another cable (usually) detachable which connects that block to the mains outlet.

It is rare for the mains cable to fail, but not uncomon for the cable which connects to the laptop to fail.

I doubt the main power cord (which plugs into the wall outlet) is faulty, as if it was there would be no indicator lights showing on the laptop.

What I am suggesting however is that the actual adapter itself (the block) may not be providng correct volts out, or enough current, to power the laptop properly; even though it can light up the various led indicators..

Occasionally the laptop power adapter mght be built into the actual plug whch goes into the wall outlet, and thus there is just the single, thin(er) cable from that to the laptop. However unless the laptop is more like say a tablet, or the mini notebooks, the adapter is likely to as described earlier above.

This eBay link shows typical power adapters as used on many laptops, other than Apple.

http://www.ebay.com/sch/Laptop-Powe...

As earlier, visit a local store and ask to test your laptop using one of their compatible adapters. If the problem persists even with their known good adapter then the problem is within the laptop itself.

message edited by trvlr


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#11
April 20, 2017 at 16:04:46
Incidentally, are there any sounds of the cooling fan starting up?

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#12
April 20, 2017 at 16:22:32
Ok I'll see if I can borrow one. thanks,

vandal67


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#13
April 20, 2017 at 16:23:00
No fan or any other noise.

vandal67


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#14
April 20, 2017 at 16:40:04
✔ Best Answer
When you've tested with a known good power adapter let us know what the result was (please).

Remember the test adapter must be correct voltage and provide the same or higher current output that your present adapter has. Also the the polarity of the centre "pin" must be the same as your present adapter.

Any competent techie at a decent store will know that anyway (or ought to).


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#15
April 22, 2017 at 12:23:17
OK - I'll let u know as soon as I can find the right adapter. Thanks!

vandal67


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#16
April 27, 2017 at 13:49:26
I finally found the correct power cord, and it worked. Thanks to everybody!

vandal67


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#17
April 27, 2017 at 14:22:52
Good to hear and thanks for letting us know.

message edited by Derek


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#18
April 27, 2017 at 18:54:32
Reply #1 pointed to this initially.

You have to be a little bit crazy to keep you from going insane.


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#19
April 30, 2017 at 16:05:01
Well. don't know if anyone's still following this thread, but the laptop quit powering up again. Took to Staples where I had purchased new power adapter. They said it might be the motherboard. Just wanted to let everyone know.

vandal67


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#20
April 30, 2017 at 16:10:40
mmm Could be the motherboard... If no lights at all, it might be either power in jack, or even the on/off button...

Presumably Staples allowed a test with another power adapter?

How olde is the laptop?


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#21
April 30, 2017 at 17:04:43
They did not test with another adapter. 3-4 years old - not used very often

vandal67


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#22
May 1, 2017 at 03:28:40
I'd still test with another adapter... Even relatively new power adapters can fail. Ensure that all cords associated with the adapter are also new, as in don't use any from your previous adapters for tests.

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#23
May 1, 2017 at 20:42:55
Could be simply the Power Jack on the laptop as well.

You have to be a little bit crazy to keep you from going insane.


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#24
May 2, 2017 at 01:43:49
The power jack is not unknown to fail... Also there are several variations on the size of the centre pin across the whole laptop range. Would be wise to ensure that apparently ok replacement has the correct size plug; as in it's a snug/tight fit and doesn't move about or in effect wobble within the jack socket.

message edited by trvlr


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#25
May 6, 2017 at 16:33:38
I will have a new power adapter soon. Will let you know.

vandal67


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#26
May 6, 2017 at 19:24:30
Tried with new adapter, didn't turn on. If the battery is bad, should the pc still turn on with good adapter?

vandal67


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#27
May 6, 2017 at 19:29:24
"If the battery is bad, should the pc still turn on with good adapter?"
Yes. That makes it look like trouble inside the laptop. Maybe the On/Off switch or associated circuitry.

Always pop back and let us know the outcome - thanks

message edited by Derek


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#28
June 20, 2017 at 19:12:44
Finally had time to dismantle the laptop after new dc power jack arrived. Installed it and laptop is working fine. Thanks to all for the input.

vandal67


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#29
June 20, 2017 at 21:22:47
Great to hear, thanks for letting us know.
It is always easier to try the easier things first and avoid assuming the worst.

You have to be a little bit crazy to keep you from going insane.


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