Hp prime restarting nonstop

[FoxyHP]

I have had an HP Prime graphing calculator for about two years which just recently has gotten locked up permanantly. I was trying to graph the derivitive of an equation, so I entered 'Slope(5x-1)'. I hit Plot, and my calculator crashed. It tried to restart, showed the HP logo and the standard startup screen with x squared plus y squared equals 1 in big letters, showed the grid of the graph for maybe a tenth of a second, and crashed again. It's been in an endless process of trying to restart and crashing ever since. I tried pushing the restart pin on the back of the calculator, letting the battery die and then plugging it in, and removing the battery and plugging it in then, but none of that worked. I'm at a loss of what to do, and was hoping someone might have an idea of how to fix this.

Thanks!

[Maké · Accepted solution]

Hi!, FoxyHP:

Welcome, to Forum !.

See, this link ... http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv021.cgi?read=251410

[FoxyHP]

Okay, I tried holding F, C, and O while it restarted, and I managed to get to the menu options. I factory reset my calculator, and everything works superbly, exept for one thing. For some reason, the contrast of the screen is acting up so that the display is all faded out and too bright. I tried adjusting the brightness by holding the On button and pushing + or -, but that only effected the brightness and left the display still faded. Is there anything to fix this?

Thanks for all the help!

[Maké]

Hi!, FoxyHP:

To reduce or, increase the brightness, you must press, the ON button and press and hold 1, 2 or 3 times, the + or - key, to achieve calibration what, you need, as follow ...

 

[FoxyHP]

I tried that but it only made the screen brighter, and left everything still faded out.

[Maké]

Hi!, FoxyHP:

May be you needed realize DIAGNOSTIC Mode.

To put the Prime, in Diagnostic Mode, press F C O keys all at the same time while doing a pin reset to back of the unit. It should display the "EA656 DIAGNOSTIC" Screen Menu.

Press ...

5.Evaluation and ENTER key

Press ...

B. BKLED and ENTER key

If you see blue screen, press with you finger, in CLOSE

Equal for LOW, MIDDLE, HIGH, Green CLOSE, LOW, MIDDLE, HIGH, dark red, CLOSE, LOW, MIDDLE, HIGH, White CLOSE, LOW, MIDDLE, HIGH. If all OK, appear in B. BKLED ... OK, in blue.

For EXIT, press RESET and ENTER.

[FoxyHP]

I tried that and it still didn't work. I'm still seeing a faded-out screen. When I did the test for the screen colors, they showed up in perfect color though.

[Maké]

Hi!, FoxyHP:

Can you indicate, what is this, the ROM version, of your HP PRIME, from ? ...  

Note: The ultimate version is, 8151 of 6/17/2015

If you didn't have this version, you can try download this, from ... ftp://ftp.hp.com/pub/calculators/Prime/