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The calculator no longer turns on despite new batteries

Does not turn on despite new batteries. Have been told there is a chip which needs replacing? Have had other calculators repaired that way, but this one only lasted 6 months. Have had repairs done this way 6 times before but would prefer if there is a method which is more permanent. The HP 41 came out in 1980 and have 6 in my possession. Over time the calculaters degenerate and can not be activated. Presentlt only 1 is working and it is showing signs of 'pcking it in'. In my opinion the newer models are not a patch on the HP41, HP41C, HP41CV or the HP41CX.

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Hi
Well, this might not be right, but check the Brightness. Hit 2nd, then the down arrow. repeat this a few times. see if that works.

Posted on Dec 28, 2008

  • ABHISHEK.C
    ABHISHEK.C Dec 28, 2008

    lets try a reset this calculator? Back to factory settings?
    =shift , setup button.. 1 is for fraction, 2 for decimal.

  • ABHISHEK.C
    ABHISHEK.C Dec 28, 2008

    if you already done removing the battery then perform this operation! 

    SHIFT 9 (CLR) 3 (ALL) = YES

    This will initialize the calculator and return the calculation mode and setup to its initial default setting. this will also clear all data currently in the calculator.



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The replacing chip may solve the problem temporarily for permanent fix you need to call service technican to check the internal connection .

Posted on Dec 28, 2008

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Sir,

Click this link for more info

check the manufacturer's website, if any update firmware is avialable. Better go through the manual. If it not worked if u have warranty period better replace

thanks
good luck

Posted on Dec 28, 2008

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Hi and welcome to FixYa,

My compliments, the HP41 do bring back school days memories.

To your concern, initially, pls try:

  • hard reset, remove battery pack, short the battery terminals of the HP41;
  • replace/recharge batteries;
  • clean, scrape the battery terminals. In some instances they may have to be stretched/bent to ensure more pressure/contact with the batteries;
  • unplug any peripherals/external add-ons;
  • perform a memory reset by turning the HP41 OFF, pres and hold the backarrow < while turning the unit ON.
Should the above be not corrective, then the unit has to be opened up and voltage measurements be performed on the powersupply section. You may be interested to reference some repair pages.

Good luck and Thank you for using FixYa.

Posted on Dec 28, 2008

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Hi,
It has two batteries CR2032. They should not be removed at the same time. There must always be one battery in the calculator. The calculator should be turned OFF when changing batteries.

Often after you change batteries the screen contrast may be too light and you cannot see anything. The contrast can be adjusted (lightened or darkened). As you adjust the contrast setting,a highlighted number in the upper right corner changes to indicate the current contrast setting; 0 is the lightest, and 9 is the darkest.
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Hope it helps.
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