Go Back   Computer Forums > General Computing > Hardware
Click Here to Login
Join Computer forums Today


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-07-2012, 03:20 PM   #1
Daemon Poster
 
arsenalbates's Avatar
 
Join Date: Feb 2010
Posts: 615
Send a message via MSN to arsenalbates
Default Laptop wont take power ?

Hi, i have a laptop that was working fine however I moved the laptop and the computer powered down, I had no battery in the laptop at this point.

I asumed the power cable was bad so i checked the volts and i got 18v but i need 19.5

Then i went on to the socket on the mobo and tested the volts coming out from the back of the socket and i got 18v.

The dc socket is on a spereate board that is replacable but i cant understand why the laptop is not recieving power. The cable and the dc port is both giving out 18.1v.

Any ideas ?

---------- Post added at 08:20 PM ---------- Previous post was at 08:16 PM ----------

Update : the lead is giving out 18.1 v and the laptop says on the bottom it needs 19.5 at 3.5a .

Could this be my prob ?
__________________

arsenalbates is offline   Reply With Quote
Old 03-07-2012, 07:51 PM   #2
Solid State Member
 
Join Date: Mar 2012
Location: *
Posts: 13
Default Re: Laptop wont take power ?

You can generally allow a +/- of 2-3 volts. Try letting the computer rest for a little bit.
__________________

.eXe is offline   Reply With Quote
Old 03-08-2012, 04:13 AM   #3
Daemon Poster
 
arsenalbates's Avatar
 
Join Date: Feb 2010
Posts: 615
Send a message via MSN to arsenalbates
Default Re: Laptop wont take power ?

Right so it may not be the power supply. I have left the computer overnight without the battery in and without the power cable in and this morning its acting up just the same. It is totally dead. imm guessing now that it must be something to do with the sister board that contains the ethernet port, usb, graphics output and the jack istelf.
arsenalbates is offline   Reply With Quote
Old 03-08-2012, 04:51 PM   #4
Golden Master
 
Join Date: Mar 2005
Posts: 13,091
Default Re: Laptop wont take power ?

Well, unless it's physical damage, like the AC jack is loose, it won't be that. What .eXe mentioned is true, however some are pretty finicky. Try another adaptor if you can.
lhuser is offline   Reply With Quote
Old 03-08-2012, 04:55 PM   #5
Daemon Poster
 
arsenalbates's Avatar
 
Join Date: Feb 2010
Posts: 615
Send a message via MSN to arsenalbates
Default Re: Laptop wont take power ?

Just tried another power adaptor and its now working. Duff power supply

Cheers for the replies
arsenalbates is offline   Reply With Quote
Old 03-08-2012, 05:46 PM   #6
Solid State Member
 
Join Date: Mar 2012
Location: *
Posts: 13
Default Re: Laptop wont take power ?

Quote:
Originally Posted by arsenalbates View Post
Just tried another power adaptor and its now working. Duff power supply

Cheers for the replies
Glad you got it fixed.
.eXe is offline   Reply With Quote
Old 03-09-2012, 11:58 PM   #7
Wizard of Wires
 
setishock's Avatar
 
Join Date: Feb 2005
Location: Not sure
Posts: 10,030
Default Re: Laptop wont take power ?

This is not true in all cases but I've found it to be true most of the time >
An unloaded power supply will show the proper voltage well inside the tolerance range. It might even be higher slightly than the spec-ed voltage. Nothing to worry about.
What happens is when you loaded the power supply by connecting a device, the regulators adjust to the load. Then if you put a meter on the power to load connection you see the proper voltage.
But if the power supply is a flake you may see the voltage either way below what is required or it might just crash altogether.

Here's the poop on how it works. Amps is the amount of power. Voltage is the push behind it. If there's not enough push or none at all it just doesn't deliver the goods.
__________________

setishock is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 07:38 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0