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Windows 7: ac not charging in 1st laptop, only charging when off in 2nd laptop?

28 Jan 2015   #1
ronhexy

win7 64 eval copy 2014
 
 
ac not charging in 1st laptop, only charging when off in 2nd laptop?

Original AC wont charge or pass power to my lenovo2010... electricity goes through for a second before to stop.

So i isolated the problem, by using the ac in another lenovo 2005, which charges when turned off, but not when turned on?!

So AC's the buggger.... but that kinda bug is mesmerizing as, after applying "microsoft acpi uninstall&reboot" fix and the power did go through the boot on the lenovo2010, to finally revert to old issue, which makes me think voltage problem perhaps?! I am in the 3rd world and don't have a regulator, Perhaps it's the electricity?

meanwhile i am using a universal AC that works on both!


My System SpecsSystem Spec
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28 Jan 2015   #2
oscer1

win 7 64 bit
 
 

Hi
From what you discribed sounds like the adapter is faulty as you have a universal adapter just use that one or buy another adapter
My System SpecsSystem Spec
28 Jan 2015   #3
ronhexy

win7 64 eval copy 2014
 
 

Yes i am aware of the "apple option" to just replace it, and it would work...

I tend to fish for educative information though, as if the electricity is the issue instead of the ac... the appropriate solution would be to buy a regulator.

if the ac could be salvaged, if what i describe is a electrical exception (and believe me 3rd world country bring some perspectives on what is and what isn't, i learnt a world of anomaly through my life here, and the solution are often foreign to 1st world youngster who never had to deal with messed up electricity networks)

Especially that uninstalling the microsoft power acpi seemed to have an effect on the behavior... that's is what really makes me doubt the ac... even thought it's a long shot.

Also, with the electronics becoming more and more sensitive to voltages i feel i could learn a bunch on the subject.

Thanks though (we all suspect it's the AC... i am sure)
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29 Jan 2015   #4
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

Most of the better built AC power supply/chargers for laptops are built to handle dual voltage (US 115v, outside US 220v) and do the switching internally. Additionally the better made ones can "even out" dirty power (voltage that does not stay constant) to deliver clean DC voltage to the laptop.
But all of this filtering can shorten the life of the PS/charger. And the more cheaply built the unit is the faster it will fail.

I advise to not play with your system's power settings. Get a good quality replacement PS/charger instead.
My System SpecsSystem Spec
30 Jan 2015   #5
ronhexy

win7 64 eval copy 2014
 
 

inv/converters, that's never an issue due to "cost" and "effectiveness" (gotta buy new in those cases) but you did make me think twice (i never got a original-AC die on me and i run my laptops 24/7 always) and after 4years i might just got one that's busted, who knows.
(working on one pc while failing on the other is the reason of my wild-fishing in this post!!)


Did Not know of internal "regulator" that can "even out" dirty power, good to know.
(now it makes sense that we mainly use regulator for desktop and never worry about the laptop)

When Ac-adapter dies/cripples is there any physical indicators? i open the casing and all wires and parts(even unfolded the metal-sheet around look like new)

Last but not least is that true that universal-adapters are bad for the PC?
(not due to their cheaper built but regarding wider-range of output)
My System SpecsSystem Spec
30 Jan 2015   #6
TVeblen

Microsoft Community Contributor Award Recipient

Windows 7 64 Bit Home Premium SP1
 
 

If you are "lucky" you could see physical damage in the adapter, but most often the failed part has not observable damage.

There are 2 things about adapter replacement that are "bad for the PC" (a laptop or notebook): Incorrect voltage and incorrect amperage.

If you look at your original equipment adapter (the one that came with the laptop), on the back is a label and it will tell you the OUTPUT voltage and amperage, plus total Watts. One I have in front of me is 19v and 3.42A for 65 Watts.
If I were to replace this adapter I would make sure the replacement only put out 19v, 3.42A. Any different voltage and amperage could damage or shorten the life of the battery and/or laptop.
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 ac not charging in 1st laptop, only charging when off in 2nd laptop?




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