HP elitebook 8470p extended battery won't charge or drain

[rockadder]

most likely a problem with the motherboard and am willing to try and fix it on my own. but the extended battery won't drain or charge. i already replaced the extended battery so its not the problem and neither is the charger. Just looking to know if anyone knows the specific thing that will need to be fixed.

 

[webworkings]

When you replaced the battery, did you get an OEM battery or an after market one? If it is after market, that could be where your problem lies. While some things after market are great, laptop batteries are not one of them.

Also, you should check to make sure the battery isn't loose at all when put in. Anything that can lead to lack of connection.

Another thing to try is to turn the laptop off and see if it charges then. If it will charge when off, but not when the laptop is on, then the problem may also include the cord.

 

[rockadder]

When you replaced the battery, did you get an OEM battery or an after market one? If it is after market, that could be where your problem lies. While some things after market are great, laptop batteries are not one of them.

Also, you should check to make sure the battery isn't loose at all when put in. Anything that can lead to lack of connection.

Another thing to try is to turn the laptop off and see if it charges then. If it will charge when off, but not when the laptop is on, then the problem may also include the cord.

OEM battery, no loose connection. doesn't charge when the laptop is off

 

[webworkings]

If that is the case the only other option I can think of would be either a bad battery (which can happen even with a new one) or the charging circuit is gone. If it is the latter, then you may well wind up having the replace the motherboard.

 

[MusenMouse]

If you download the UEFI diagnostic tool from HP's site you can do a test of the components and see if it comes up with anything. You have to install it and then press F2 as the computer turns on to access the diagnostic tool.

http/h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=5212910&swLangOid=8&swEnvOid=4059

 

[rockadder]

If that is the case the only other option I can think of would be either a bad battery (which can happen even with a new one) or the charging circuit is gone. If it is the latter, then you may well wind up having the replace the motherboard.

yep, i will most likely replace the motherboard. It sounds hard, is it?

 

[rockadder]

If you download the UEFI diagnostic tool from HP's site you can do a test of the components and see if it comes up with anything. You have to install it and then press F2 as the computer turns on to access the diagnostic tool.

http/h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=5212910&swLangOid=8&swEnvOid=4059

it said the secondary battery was weak, but the diagnostic tool doesn't seem to be very useful because it doesn't diagnose if the motherboard has a problem. plus its sort of odd that the secondary battery won't drain.

Is changing the motherboard difficult? would i just need to do some soldering on the charging circuit?

 

[MusenMouse]

If you download the UEFI diagnostic tool from HP's site you can do a test of the components and see if it comes up with anything. You have to install it and then press F2 as the computer turns on to access the diagnostic tool.

http/h20564.www2.hp.com/hpsc/swd/public/readIndex?sp4ts.oid=5212910&swLangOid=8&swEnvOid=4059

it said the secondary battery was weak, but the diagnostic tool doesn't seem to be very useful because it doesn't diagnose if the motherboard has a problem. plus its sort of odd that the secondary battery won't drain.

Is changing the motherboard difficult? would i just need to do some soldering on the charging circuit?

Last time I saw an HP tech take one apart he just took apart the laptop shell and then had to replace the whole motherboard, might not have been the same model. There was another forum post recently about a HP 8560w that would not charge the secondary battery without a working primary battery, how is the primary battery?

For reference here is the link to the thread http/www.tomshardware.com/answers/id-3223918/elitebook-8560w-battery-charging.html

 

[rockadder]

the primary battery is working fantastically.

 

[rockadder]

So when replacing the motherboard does it come with the ram and processor and all that or will i have to take it from the ol motherboard and put it on the new one?

 

[MusenMouse]

So when replacing the motherboard does it come with the ram and processor and all that or will i have to take it from the ol motherboard and put it on the new one?

You will have to look at the listing to be sure, but usually they come only with the MB and you have to swap over the RAM and CPU yourself. Make sure to have some thermal compound on hand when you swap over the CPU.