Jump to content


 


Register a free account to unlock additional features at BleepingComputer.com
Welcome to BleepingComputer, a free community where people like yourself come together to discuss and learn how to use their computers. Using the site is easy and fun. As a guest, you can browse and view the various discussions in the forums, but can not create a new topic or reply to an existing one unless you are logged in. Other benefits of registering an account are subscribing to topics and forums, creating a blog, and having no ads shown anywhere on the site.


Click here to Register a free account now! or read our Welcome Guide to learn how to use this site.

Photo

Is power adaptor faulty or maybe something else...


  • Please log in to reply
2 replies to this topic

#1 panthera0404

panthera0404

  • Members
  • 44 posts
  • OFFLINE
  •  
  • Local time:06:25 PM

Posted 25 August 2014 - 01:39 PM

I have a Lenovo C440 all-in-one. As of today it is not working. No sign of anything.
I tested the power supply with multimeter and it shows 0.1, 0.8V. When I unplug the power cord, and plug it again , test shows 19,47V,I plug adapter to the computer, and immediately plug off the adapter, test it again and again it shows 0,9V, 1,1V, eventually drops to 0.1. Once again i unplug adapter from power cord and again plug it in after 10 second, test shows 19,47V, but when i plug it into computer test shows again low values.
Is the power adapter faulty or motherboard may cause problems to the adapter?


BC AdBot (Login to Remove)

 


#2 dpunisher

dpunisher

  • BC Advisor
  • 2,234 posts
  • OFFLINE
  •  
  • Gender:Male
  • Location:South TX
  • Local time:11:25 AM

Posted 25 August 2014 - 09:41 PM

 

Is the power adapter faulty or motherboard may cause problems to the adapter?

 

 

Yes.  I know its not what you want to hear, but a faulty power adapter, and a bad/broken/shorted power socket, or motherboard can cause those symptoms. (<Conjunction Junction would be proud)  A power brick can shut down in case of a short to protect itself.

 

I am fortunate to have extra power bricks and adapters here to test problems like this.  Likely you don't have another brick, but that will be the easiest/most foolproof way to pinpoint the problem.

 

Examine the socket for obvious damage.  If you are careful, and you have a DVOM with small enough probes, you might ck the resistance of the socket, but that would still be inconclusive.


Edited by dpunisher, 25 August 2014 - 09:43 PM.

I am a retired Ford tech. Next to Fords, any computer is a piece of cake. (The cake, its not a lie)

3770K @4.5, Corsair H100, GTX780, 16gig Samsung, Obsidian 700 (yes there is a 700)


#3 panthera0404

panthera0404
  • Topic Starter

  • Members
  • 44 posts
  • OFFLINE
  •  
  • Local time:06:25 PM

Posted 27 August 2014 - 04:08 AM

Thanks for reply. 

No luck with another brick, no power at all, completely dead

I guess MBO is caput. 

i see no other option than to bake it, i tried pushing socket a bit, nothing. oh well here goes baking:(






0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users