HP Portable plus


Someone knows the function of a 3 pin jumper (J11) located in the battery compartment of an HP Portable Plus? And the J10 connector (8 pin)?

I would be grateful if someone has the schematic of the HP Portable plus.


Hi Gonzalo,

I think that the 3-pin connector is used to disconnect the battery, during long non operating periods, but I may be wrong.

But I'm quite sure that the 8-pin connector is used to connect an external video interface.



correct me if I'm wrong, but the question you're asking is related to the portable that you bought from me and just received on the 13th of October, right ?
You complained to me that you could not run it from a battery and accused me of not stating this problem in the auction (see item 180032071955). I did mention on the auction that the portable had no battery and that you could run it on the AC adapter. I could not test it with a battery as I don't have a working one. Could it be that the problem comes from this J11 jumper which disconnects the battery ?
You mentioned 2 other cosmetic problems (3 missing screws and a missing plastic piece around the screen) all which I did admit that I didn't chek carefully enough to notice them. I therefore offered to take the item back and give you a full refund (including shipping) but you refused and gave me a negative feedback !! What more could I do ?


In my post I asked about the schematic of the Portable Plus. I already connected a battery in the two big connectors, without touching the J11 connector (because I do not know the function of this connector), but the portable doesn´t power on. Also, I already let you know that the fuse is replaced with a piece of solid wire. I replaced it with a picofuse of 1A and it blows, so something is wrong with the battery charger, hence I require the schematic to see if I can repair.


I confirm that J11 is used to disconnect the battery.

I hope it helps



Thanks for the schematic, but I have checked with a multimeter and there is no voltage in VBAT terminal. Can the zener or the transistor be broken?


If the Portable can be run from the external supply, then the charger must be OK because it supplies the Portable as well, and you should see the voltage on the battery terminals . Check again J11, a jumper must be installed in the left position, and the fuse. If there is still no voltage on the battery terminals, check the tracks on the PCB.


Possibly Related Threads…
Thread Author Replies Views Last Post
  Portable HP Prime Emulator bluesun08 7 2,660 10-03-2013, 01:37 PM
Last Post: fhub
  Need a US proxy for a battery for an HP Portable Plus Geir Isene 5 1,938 10-31-2011, 07:56 PM
Last Post: John Pierce
  Problem with HP 110+ / Portable Plus battery charging (+workaround) John AS (UK) 2 1,226 04-21-2010, 01:32 PM
Last Post: John AS (UK)
  Notes on installing EMU41P on Portable Plus John AS (UK) 0 820 03-04-2010, 03:19 AM
Last Post: John AS (UK)
  HP Portable Plus Stefan Vorkoetter 2 1,206 05-20-2008, 07:02 PM
Last Post: Raymond Del Tondo
  HP110 Portable battery Prabhu Bhooplapur 2 1,276 03-25-2008, 09:33 AM
Last Post: Prabhu Bhooplapur
  HP Portable Plus John W Kercheval 4 1,430 12-24-2007, 12:10 PM
Last Post: John W Kercheval
  HP to set up separate portable device business Greg Harris (Sydney Australia) 1 913 02-14-2006, 08:45 AM
Last Post: Paul Brogger
  HP Portable Plus? Howard Owen 1 882 08-14-2005, 06:26 AM
Last Post: Tony Duell
  Emu41 versions for HP 95/100/200LX and Portable Plus J-F Garnier 2 1,035 12-21-2004, 06:10 PM
Last Post: tony

Forum Jump: