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Hernando553
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Message 1 of 6
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HP50g not working. HELP please

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HP 50g
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Hi there. 

 

I have got a situation with my HP50g. I put new batteries on it. It starts automatically, but with a black screen. 

I can not power off, nor do anything with it. 

 

It is like dead. 

 

Does someone have had any trouble like these? 

This is the black screen i got no matter whatThis is the black screen i got no matter what

 

 

Thank you very much in advance

 

Best Regards

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Maké
Level 9
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Message 2 of 6
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Hi!, @Hernando553 :

1) Press ON and holding down the ON key, press several times, the minus (-) key for reduce contrast and ON and plus (+) key for increase contrast.

2) Insert the tip of a paper clip into the RESET hole, located on the back cover on the left side below.

3) Clean the poles of batteries and if you know, with a tester measure the total voltage.

4) You can Monitoring Batteries charge, with the Library BatMon 1.0, from … https://www.hpcalc.org/details/6587

5) If not solve your problem, write again.

Kind Regards !.
Have a nice day !.
@Maké (Technical Advisor Premium - HP Program Top Contributor).
Provost in HP Spanish Public Forum ... https://h30467.www3.hp.com/
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Hernando553
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Message 3 of 6
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Hi there. Thank you for your answer.

 

I have performed the steps you mentioned. BUT...

 

No, it is not a contrast issue this. It is way more complex than that.
I think it is related to a flash issue. Does anyone knows how to reflash it?


Thank you very much in advance.

 

Best Regards

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Maké
Level 9
3,551 3,490 180 541
Message 4 of 6
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Hi!, @Hernando553 :

1) Check if your calculator have inserted any SD (Secure Digital). If yes, extracted.

2) Try, with other's four (4) alkaline batteries AAA, of 1.5VDC.

3) If not run OK, then, the unique way is discharge or change, the capacitor (condenser).

4) If continued without run and you not have warranty, you can contact in Perú, with DEACHP, from … http://www.deachp.com/contacto/

Kind Regards !.
Have a nice day !.
@Maké (Technical Advisor Premium - HP Program Top Contributor).
Provost in HP Spanish Public Forum ... https://h30467.www3.hp.com/
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BartdB
Level 9
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Message 5 of 6
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Hi,

 

You can attempt to reflash your calculator using the last released ROM version available here:

https://www.hpcalc.org/details/7097

 

Instructions in PDF are included.

 

There are two methods to reflash the calculator: using an SD card or over USB. As you cannot start your calculator normally, you will have to use the SD option. (also the USB drivers are an issue on modern Windows OS).

 

Notes for the SD card:

1) it must be 2GB or less (bigger SD cards are SDHC or SDXC which do not work in the 50G)

2) for this procedure, it must be formatted on as either FAT or FAT16, not FAT32

Then continue as per the instructions.

A note on point 3 of the instructions - it takes a little practice to get the timing right so a few attempts of steps 2 & 3 may be necessary.

 

Regards.

 

-Bart
_________________________________________________________
calculator enthusiast
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BartdB
Level 9
971 954 119 186
Message 6 of 6
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Hi,

 

Sorry I have realised the above instructions for updating may not work if your calculator is stuck on with the black screen.

 

You can try using the "reset hole" method instead.

 

Insert SD card with new ROM files

Using a straightened paper clip, insert it into the reset hole on the back of the calculator

Whilst holding it there press the + and - keys together

Now remove the paper clip whilst still holding the + and - keys

After about 3 seconds release the + and - keys together

Hopefully you get a screen screen showing :

1. UPDATE CODE

2. SELFTEST

 

choose 1. UPDATE CODE

select CARD

 

Regards,

-Bart
_________________________________________________________
calculator enthusiast
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