Question about Sharp EL-531VB Calculator

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Display issues I replaced the batteries in my calculator, but it still only displays half of each number--everything else works fine.

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Re: Display issues

It has recently happend to me with my sharp calculator. Experts says that it has no fix and that it would be cheaper to buy a new one.

Posted on Feb 01, 2008

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Screen does not display complete numbers

Half of the display is only working, the problem is in the driver ic that drives the display, it is simply not cost effective to repair the item, further ahead to replace the calculator.

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When I press ON, my calculator screen displays a couple random numbers and letters scattered across the screen, including a solid vertical line in the upper right corner. As soon as I push any key, the...

There are three possible solutions here. From what you are describing to me, you say the screen displays a couple of random numbers and letters, including a solid vertical line in the upper right corner, are scattered across the screen? Sounds like you are still in graphing mode. There is nothing wrong with your batteries and changing them won't help because I already know that you didn't change the CR Lithium Battery. This is the "memory card" for the TI-83 Plus. If you don't change that, when you insert new AAA batteries in the calculator, the memory has not been deleted. You probably don't remember, but the calculator remembers the last problem that you did, which was a graphing calculation. Try pressing the "Graph" button and the calculator will go back to function mode. If this doesn't work, try resetting all the memory.
  1. Remove a battery from the battery bay.
  2. Press and hold the CLEAR button while re-installing the battery.
  3. While still pressing the CLEAR key, press and hold down the ON button. If the home screen displays, release the keys.
  4. If the home screen is displayed, press 2nd MEMto display the memory menu.
  5. Select 7:Reset to display the "RAM ARCHIVE ALL" menu.
  6. Press the right arrow twice to display the "ALL" menu.
  7. Select 1:All Memory to display the "RESET MEMORY" menu.
  8. To proceed with the reset, select 2:Reset. The message "MEM cleared" is displayed on the home screen.
If this doesn't work, try changing the CR Lithium Battery. It is located in the battery bay at the top with the cross-head screw in it (It says BACK-UP BATTERY). It tells you what type of battery it takes and how to insert them in. I hope these possible solutions help. If all of them don't, then the only other thing I can think of is that it has some internal part alignment issues or a cold soldering iron blob, on the inside of the calculator. I saw one time on the Internet that cold soldering irons can sometimes make electronics not work properly.

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HP12c showed expected display for low battery (star in lower left), put new batteries in and could not get any display at all. Took betteries out of mine (working great!) and now the one not working shows...

Resetting the calculator using the keyboardThe easiest reset is done from the keyboard. To reset the calculator, follow the procedures below in the order presented.
  1. Press ON to turn off the calculator.
  2. Press and hold [ - ] .
  3. Press and release ON .
  4. Release [ - ] .
  5. The screen will display “Pr Error
  6. The calculator will reset to the default settings, and the memory will be erased.

Aug 04, 2010 | HP 12c Calculator

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The calculator is intermittent: Most of the time

Not knowing what to do, I tried anything that could possibly help:

I installed fresh batteries and I pushed the reset button on the back of the calculator (Sharp EL-546L) and finally, it work all right after more than 5 years I own the calculator and where it did work correctly for 5 minutes. I tried the reset button in the past (long time ago) and it didn't work. This time it worked because, maybe, I've used fresh batteries.


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TI-82 display isn't fully working

This happens alot with calculators that have been in storage for a while, you can fix this by taking the batteries out and let it sit overnight.

May 05, 2009 | Texas Instruments TI-82 Calculator

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Display / LCD issue

Try adjusting the brightness setting for the LCD screen by holding down the "on" key and pressing the "+" key at the same time to make your screen darker or the "-" key at the same time to make it darker.

Jan 18, 2009 | HP 48gx Calculator

1 Answer


Unscrew the six small screws on the back with a small phillips cross head screwdriver (an eye glass screwdriver works fine), then carefully prise off the back using a flat blade in the two slots at the top of the calculator.

Keep it upside down or the display will fall out!

You'll see the two 1.5 volt alkaline batteries there, GPA-76 type (flat, round) in mine. Ease them out carefully and replace them, positive side up.

Alternative battery codes (manufacturer dependent) L1154, AG13, GA13, AG76, GP76A, 675HR, LR1154, LR44 per battery web sites, maybe others.

Make sure batteries are seated and display is in its correct position, replace back cover and six screws.

Caveat 1 : You can buy the TI-30XA for about $10-$13 at Staples/Amazon, two batteries will set you back around $5-$7!! But they last a couple years even with heavy use. TI-36X and TI-30X IIS are better calculators and have solar cells as well.....but about twice the price at $17-$25.

Caveat 2: I had one of these where the display faded, replaced batteries, did nothing because circuit board or display was bad. So you could replace batteries and waste the time/money.

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4 Answers

Lower half of numbers gone


The only solution which can be tried is replacing the battery.


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