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Location of CMOS Battery in HP Pavilion N3390 Laptop



 
 
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  #1  
Old January 15th 13, 01:38 PM posted to microsoft.public.windowsxp.hardware
No_Name
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Posts: 311
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

On Mon, 14 Jan 2013 16:05:33 -0600, in microsoft.public.windowsxp.hardware you
wrote:

SNIP

page 6-51, shows the CMOS battery is on the top of the mobo (not on the
bottom side using the access panels) and sits vertically in a slot in
the plastic of the case. In fact, it looks like you don't just swap in
a CR2032 common coin cell battery but have to get one with leads and
connector attached to it. I suppose you could do some soldering to use
a coin cell you buy in a store. The service manual for the dv6000 at
http://h10032.www1.hp.com/ctg/Manual/c01035677.pdf shows the CMOS
battery is under the memory access plate. Maybe you're looking for a
coin cell slid into a metal retaining bracket, like in desktops;
however, this also shows a replacement that has soldered leads and a
connector so, if this was the case for you, then maybe you wouldn't
recognize it as the CMOS battery.

Hi Vanguard,

I would never solder a wire to one of those "coin" batteries.

The location of the CMOS/RTC battery in the DV6000 is terrific!
Unfortunately, it isn't the same for my model HP Pavilion N3390.

John

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  #2  
Old January 16th 13, 12:30 AM posted to microsoft.public.windowsxp.hardware
VanguardLH[_2_]
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Posts: 10,229
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

"jaugustine" wrote:

I would never solder a wire to one of those "coin" batteries.


What I'm saying is that you may not simply be able to buy a coin cell
battery from a store to slide into a holder on the mobo. There may be
no coin cell bracket. Instead there may be a connector on the mobo and
you're stuck having to use a battery that has the right length leads and
connector on the end (i.e., you have to get or make a coin cell battery
with the leads and connector).

Also, as mentioned, there may be no external battery for you to replace.
They may have used a capacitor (soldered on), a battery IC (also
soldered on), or the RTC chip (soldered on) has an internal battery that
is also used for CMOS.

You might want to call Dell's support to find out (1) is there a battery
that can be replaced (so it's not a capacitor, IC, or RTC part that's
soldered onto the mobo), and (2) if the battery can be replaced then is
it just a coin cell or does it have leads and a connector.
  #3  
Old January 16th 13, 01:32 AM posted to microsoft.public.windowsxp.hardware
Paul
external usenet poster
 
Posts: 18,278
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

wrote:
On Mon, 14 Jan 2013 16:05:33 -0600, in microsoft.public.windowsxp.hardware you
wrote:

SNIP
page 6-51, shows the CMOS battery is on the top of the mobo (not on the
bottom side using the access panels) and sits vertically in a slot in
the plastic of the case. In fact, it looks like you don't just swap in
a CR2032 common coin cell battery but have to get one with leads and
connector attached to it. I suppose you could do some soldering to use
a coin cell you buy in a store. The service manual for the dv6000 at
http://h10032.www1.hp.com/ctg/Manual/c01035677.pdf shows the CMOS
battery is under the memory access plate. Maybe you're looking for a
coin cell slid into a metal retaining bracket, like in desktops;
however, this also shows a replacement that has soldered leads and a
connector so, if this was the case for you, then maybe you wouldn't
recognize it as the CMOS battery.

Hi Vanguard,

I would never solder a wire to one of those "coin" batteries.

The location of the CMOS/RTC battery in the DV6000 is terrific!
Unfortunately, it isn't the same for my model HP Pavilion N3390.

John


Got it ! :-)

http://www.impactcomputers.com/f1674-69010.html

If you click the magnifier button, there are four views of
the motherboard. On the bottom of the motherboard, is a
large cover plate, covering most of the bottom. There
is a circular opening in the plate, near the barrel connector
power jack end of the photo. That's probably your CR2032
there. It appears to use an actual battery holder
on the motherboard - so no pigtail and two pin connector
for this battery.

http://images.impactcomputers.us/IYB...1674-69010.jpg

HTH,
Paul
  #4  
Old January 16th 13, 03:26 AM posted to microsoft.public.windowsxp.hardware
VanguardLH[_2_]
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Posts: 10,229
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

"Paul" wrote:

http://www.impactcomputers.com/f1674-69010.html

If you click the magnifier button, there are four views of
the motherboard. On the bottom of the motherboard, is a
large cover plate, covering most of the bottom. There
is a circular opening in the plate, near the barrel connector
power jack end of the photo. That's probably your CR2032
there. It appears to use an actual battery holder
on the motherboard - so no pigtail and two pin connector
for this battery.

http://images.impactcomputers.us/IYB...1674-69010.jpg


Is there a matching access panel or cover plate in the bottom of the
laptop's shell so the battery is accessible WITHOUT having to dismantle
the shell (take it all apart)? I would've thought that the OP would
have already opened all the access panels to look inside for an easily
accessible battery.

Here's a photo of the inside of the laptop (with the shield removed):

http://www.notebookpartsrepair.com/H...otherboard.jpg

I don't see the CMOS battery holder in that photo. From the one you
gave, the battery in this photo should be on the top right (opposite
from the drive bay) in this photo. I can't tell if the black plate atop
the mobo at the upper right in the Google photo can be removed and the
battery holder is under there.

I haven't found a good photo of the underside of the N3390's case to see
where are the access plates that can be removed to get access to the
insides. What I did find showing the underside was in the product's
online manual at:

http://h10032.www1.hp.com/ctg/Manual/lpi04219.pdf

Page 16 shows a bottom view (not a photo but grayscale sketch) of the
case. I do not see any access or cover plate at the top right of the
image (by the port replicator connector) to gain access to the battery.
So it looks like the case has to get dismantled; however, from your
photo, it appears the mobo does not have to get removed from the case.

Would've been so much easier if HP bothered to provide a downloadable
service manual for this product. It probably has a section on how to
replace the battery and what you have to dismantle to get at it.
  #5  
Old January 16th 13, 04:29 AM posted to microsoft.public.windowsxp.hardware
Paul
external usenet poster
 
Posts: 18,278
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

VanguardLH wrote:


Here's a photo of the inside of the laptop (with the shield removed):

http://www.notebookpartsrepair.com/H...otherboard.jpg

I don't see the CMOS battery holder in that photo.


I think the socket is on the solder side of the motherboard.
The board is probably double sided. Two passes through
a soldering machine.

Paul
  #6  
Old January 16th 13, 06:52 AM posted to microsoft.public.windowsxp.hardware
VanguardLH[_2_]
external usenet poster
 
Posts: 10,229
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

"Paul" wrote:

I think the socket is on the solder side of the motherboard. The board
is probably double sided. Two passes through a soldering machine.


I agree with you that the battery bracket is probably on the underside
of the mobo but the photo that I found makes it appear there is
something over that corner of the mobo (a black sheet appears over
there). I can't tell from the photo if the black cover is just some
flexible insulating sheet, hard plastic (maybe part of the case), or a
black-painted metal shield.

What I haven't seen is an access or cover plate on the underside of the
case to let the user get to that area of the mobo. That means the OP
will have to dismantle the case to get at that part of the mobo. While
that's a pain, hopefully from your pic the OP won't have to also get the
mobo out of the case.
  #7  
Old January 16th 13, 11:23 AM posted to microsoft.public.windowsxp.hardware
Paul
external usenet poster
 
Posts: 18,278
Default Location of CMOS Battery in HP Pavilion N3390 Laptop

VanguardLH wrote:
"Paul" wrote:

I think the socket is on the solder side of the motherboard. The board
is probably double sided. Two passes through a soldering machine.


I agree with you that the battery bracket is probably on the underside
of the mobo but the photo that I found makes it appear there is
something over that corner of the mobo (a black sheet appears over
there). I can't tell from the photo if the black cover is just some
flexible insulating sheet, hard plastic (maybe part of the case), or a
black-painted metal shield.

What I haven't seen is an access or cover plate on the underside of the
case to let the user get to that area of the mobo. That means the OP
will have to dismantle the case to get at that part of the mobo. While
that's a pain, hopefully from your pic the OP won't have to also get the
mobo out of the case.


The base here, almost makes it look like you will have to
pull the motherboard. I think the screws go down into this
base, rather than up through. Could be nasty. Two hours work
taking it all apart.

http://ep.yimg.com/ca/I/impactcomput..._648784956.jpg

I don't see any plate in that area. The large white square is
probably the "main plate", for RAM or the like. If you compare
to the motherboard picture, the square hole in the base, corresponds
to the dual RAM slots here. And the circular battery, is in an area
without plates as near as I can determine.

http://images.impactcomputers.us/IYB...1674-69010.jpg

That's assuming of course, that all these photos are on the level,
and not some merry Internet screwup.

Paul
 




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