10bII+ financial calculator self-resets

[Lily17]

My financial calculator resets itself everytime I try to complete a calculation. I mainly use the calculation to calculate FV, PV and to do cash flow calculations. It gives me the code COPr HP2010. It does this even when I try to switch of the calculator. It allows me to put in all the variables before going crazy. It is only 3 years old. Is there anything I can do to fix it, or should I just get a new one?

[Maké]

Hi!, Lily17 :

Try, resseting the calculator. The calculator HP10BII, is similar what your calculator.

You can, see ... https://support.hp.com/us-en/document/bpia5290

[David_M · Accepted solution]

My first thought upon reading this is that your batteries need replacing.  The drain on the batteries is higher when the CPU of the calculator is processing functions than when it's in an idle or data entry state.  The voltage level may be dropping just enough to cause the calculator to reset when you compute FV/PV/Cash Flows.

Try replacing the batteries with a reputable brand before giving up on your 10bII+. 

[cyrille]

Hello,

I second the previous post, the most likely culprit there is low battery... especially after 3 years. Have you ever changed the batteries since you bought it?

Put 2 new batteries and give it a try (actually, it will work with a single battery, at least for testing).

Cyrille

[Lily17]

That was the first thing I did and I think it made the problem worse.

[Maké]

Try, with the instruction send in my first post ...

• Resetting to drain the capacitor
  To drain the capacitor on the calculator, follow the procedure below.

  1. Remove the batteries.
  2. Place a dime in each hole.
  3. Press the dimes down and towards the top of the calculator, and hold for five (5) seconds.
  4. Remove the dimes, and put the batteries back in the calculator.
  5. The "ALL CLEAR" message will be displayed.
  6. Press the [ON] key to clear the message.
• Other solutions
  If the calculator did not display the "ALL CLEAR" message after resetting, or if resetting it did not correct the error, then remove the batteries for 24 to 48 hours.

     NOTE:

  The batteries must be removed for at least 24 hours to drain the capacitor completely.

  After letting the calculator sit without batteries for at least 24 hours, replace with fresh batteries. If the calculator continues to malfunction, it will need to be sent in for repair.

[BartdB]

Hi,

Check that the battery contacts are clean and also not loose.

Replace batteries with ones from a good brand purchased from a reputable retailer.

Cheap or fake batteries do not cut in this unit, as they do not have the ability to handle the power required when the calculator  completes a calculation (its got a fast processor that is essentially in idle when entering data, then goes full speed to give an answer. That "full speed" draws power that cheap batteries can't handle).

Also ensure that the batteries are in the right way. Both must be inserted in the same way, with the + facing out.

Regards.

[Sono99]

Many Thanks for this solution 🙂