laptop battery and charger

Reply

  #1  
Old 07-22-11, 08:50 AM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
laptop battery and charger

hp dv7 1262us battery wont charge with adapter,tested output on adapter 19v .when both batt and adapter both connected computer shuts down when starting it. left batt out tried with just adapter light comes on at connection but still nothing ,charging light blinks when batt and adapt connected. any help as i dont want to replace things that doesnt need to. thanks k
 
Sponsored Links
  #2  
Old 07-22-11, 09:01 AM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,308
Received 46 Votes on 43 Posts
Have you checked the power supply on the laptop?
 
  #3  
Old 07-22-11, 11:35 AM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
it starts to boot and then shuts off
 
  #4  
Old 07-22-11, 11:48 AM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,107
Received 0 Votes on 0 Posts
I'm not that familiar with laptops...but it's possible its the laptop power supply inside the case...not the charger or battery. I think thats what mitch meant as well.

Whats the battery voltage? Not right after it's been charging...you could just read the "surface charge"...but a day or 2 later?

Pretty sure most laptops will work without the battery in when connected to just the charger/power supply.
 
  #5  
Old 07-22-11, 12:21 PM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,308
Received 46 Votes on 43 Posts
Yes, I meant the power supply inside the laptop; it's an actual part of the machine, not something external.

I jumped to this since the laptop does not work under battery or AC power.
 
  #6  
Old 07-22-11, 03:45 PM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
didnt know there was an internal ps. daughters boyfriend has a dv7 hell let me use the battery and ps adapter to check out first before i attempt to take apart
 
  #7  
Old 07-22-11, 03:51 PM
Banned. Rule And/Or Policy Violation
Join Date: Jan 2010
Location: KS
Posts: 1,896
Received 0 Votes on 0 Posts
Originally Posted by mitch17 View Post
Yes, I meant the power supply inside the laptop; it's an actual part of the machine, not something external.

I jumped to this since the laptop does not work under battery or AC power.
There is no power supply inside a laptop. The only ones that ever had that were I think Compaq Armadas (circa 1999), because you had to plug the 120v plug right into the laptop. But if it has an external brick, THAT is the power supply. The charging circuits are built into the motherboard and are not repairable. If the charging circuit is toast, then the motherboard must be replaced.

Most common problem here is a broken DC jack in the laptop. Does wiggling the DC plug or flexing the cord make it stay on? Is the charge light "flashing" (at a regular pace, as if it means something) or is it "blinking" (irregular, as if it is losing contact intermittently)?

Edit: if you have an identical model to swap parts, that's great. Definitely give it a try.
 
  #8  
Old 07-22-11, 04:08 PM
Group Moderator
Join Date: Oct 2004
Location: WI/MN
Posts: 19,308
Received 46 Votes on 43 Posts
Thanks, Matt - didn't know laptops didn't have internal power supplies
 
  #9  
Old 07-22-11, 04:42 PM
Gunguy45's Avatar
Super Moderator
Join Date: Dec 2007
Location: USA
Posts: 21,107
Received 0 Votes on 0 Posts
Well...I didn't really mean P/S...and I don't THINK mitch did either (sorry if I'm speaking out of turn mitch). They have to have some sort of regulating/charging circuits (as you stated Matt). That's pretty much what I meant.

Seems unlikely that the connector itself is bad since voltage is getting through to light the power light. At least I think that's what was said.
 
  #10  
Old 07-22-11, 07:45 PM
Banned. Rule And/Or Policy Violation
Join Date: Jan 2010
Location: KS
Posts: 1,896
Received 0 Votes on 0 Posts
That's why I asked whether it is 'flashing' or 'blinking'. Flashing indicates that the computer is trying to tell you something. Blinking is irregular, and indicates an intermittent electrical problem.

The DC jack is a high stress point. If it has been physically broken loose from the board, it is possible that one of the traces is fractured. It is not at all uncommon for the fractured trace to be able to handle a small amount of current that trickles into the battery, but as soon as you try to turn it on or it attempts to put a rapid charge into the battery (which draws a lot of current), the fracture heats up and the circuit opens, only to close again once it cools (similar to an auto-reset circuit breaker or automotive flasher).
 

Last edited by JerseyMatt; 07-22-11 at 09:03 PM.
  #11  
Old 07-24-11, 06:57 AM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
replaced dc jack 4months ago worked fine,charging light blinking, light next to jack constant. battery i got from daughters bf different size.
 
  #12  
Old 08-08-11, 05:10 AM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
well ordered new charger and still nothing. took apart and found ac jack burned/melted at plug end ordered another , any thoughts to what may have caused it also wife says she kept plug in all time.
 
  #13  
Old 08-09-11, 03:19 AM
Member
Join Date: Apr 2007
Location: Near Buffalo, NY
Posts: 4,239
Received 0 Votes on 0 Posts
The plug loosens over time which can heat the connection.

Also, older batteries will constantly charge which draws more current when both the laptop is running and the battery is charging. To prevent this in the future, charge the battery when the laptop is off and pull the battery when it's running on AC power.
 
  #14  
Old 08-10-11, 04:11 AM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
sounds like that would do it. waiting for plug to arrive so wife can stop bugging me about it. lol. ill update progress when done with repair, hope that it is just plug burnt and nothing on mb . looks ok and smells clean as no burnt smell. thanks for reply type you soon
 
  #15  
Old 08-11-11, 01:11 AM
Member
Join Date: Jan 2011
Location: United States
Posts: 2,446
Received 0 Votes on 0 Posts
Hi I was just browsing as I hadn't been here in a while. I have a Dell laptop I bought used and while I was trying to find out things about it I came across a video made by one of their technicians. I don't have a link to it but he basically said to prevent damage like what you are talking about to prevent kinks in the cord. As for keeping the laptop plugged in all of the time I keep mine plugged in and it doesn't seem to hurt it. Just for reference my laptop is a Latitude D600. Good luck with your repair I hope it works out for you.
 
  #16  
Old 08-11-11, 07:18 AM
Member
Thread Starter
Join Date: Dec 2005
Location: ma
Posts: 97
Received 0 Votes on 0 Posts
installed the new plug and everything works again. hope it was a defective plug, if not ill be back. thanks peoples
 
Reply

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 Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: