Press [ON] [PMT] at the same time.
It should show ’ 1 5crEEn ’ on the display.
Press [+] to move down the list.
7 test sys
8 Slow clk
Stop at the respective option and press [=].
1 Screen -lights up all segments, icons, display
2 Keyboard - at the end of the test, yields ‘Good’
3 Checksum - yields 244.244 Â Basically the numbers before and after should match (one is the calculated number, the other is the number put in the flash to compare against). Note: some variant may yield 118.118 or 96.096, these are good too.
4 battery - 3.500
5 version - 7-13-2010
6 copyright - HP 2010 then 1,752
7 test sys - pressing = turns test sys off
8 Slow clk (clock?) SC -28,500.00
If you suspect the calculator is giving a wrong answer, it could be TVM compounding settings. Â HP 10bII+ is factory set to assume monthly compounding (12/Yr). To follow some examples, you may need to set annual compounding (1/Yr). Â You can set it here Â or another slightly more detailed writeup here.
If you still not getting the desired answer, you could try resetting your HP 10bII+ calculator.