When i reset my hp prime calculator, the hp logo and the x2+y2=1 screen appears over and over again,

[montiguitarrero]

Hi everyone. After i reseted the calculator, the hp logo and the  x2+y2=1 screen appears over and over again, never iniatializing. I tried to connect it to the computer (in order to upgrade the firmware) but it is not recognized (it doesn't appear not even an unknown device). I tried the CFO keys yo reset the calculator, but even in that way (after clearing the disk C: and reseting the calculator), it never initializes. Please help me. :mansad:

[Tim_Wessman]

First thing - hold down the  backspace key. If the calculator boots, horray!  (you may still want to continue to make sure you are totally up to date which adds new features)

Do you have a windows computer?

Install the HP Prime Connectivity kit. Hold down SYMB while the unit is powering on. You should see a
"recovery mode" message.

Turn on the connkit - it will probably ask you to download some files. Do so. Then connect the calculator (not before you see that "recovery" message.

Connect the calculator. It should try to update your calc.

Post back here if anything doesn't work.

[Joe_Horn]

I hope Tim's suggestions work, but if they don't, my first guess would be that a key is stuck down. Try the keyboard test (Off, C+F+O+On, 3, 3, Enter). If none of the keys are already black, and the test ends correctly ("OK" in blue) then my guess is incorrect.

Disclaimer: I don't work for HP. I'm just another happy HP calculator user.

[Maké]

Hi!, @montiguitarrero:

Press C+F+O and with pressing this key's press the ON key and wait few seconds.

Now, you can see the EA656 DIAGNOSTIC

Press ...

4.FLS Utility and ENTER key

Press ...

3.Format Disc C and ENTER key

When finishing  you see in the 3, line OK

If yes, then press Esc.

Now press ...

9. RESET and ENTER key.

You must see, in the center of display one padlock. Swipe the arrow with one finger to the left, select the language and press the ENTER key. There will be a question mark (?) And the selected language. Press OK and then Esc, to set (twice). Then the calculator will be ready to operate normally.

Note : If you need to erase the memory, press ON + Apps + Esc.

If needed install the ultimate Firmware, you can see ... ftp://ftp.hp.com/pub/calculators/Prime/