Question about Braun ET66 Calculator

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Battery Change I have three Braun ET66 calculators and I tried changing the batteries in each this past weekend. For each, once I pulled the battery and replaced it, the calculator would no longer power on. I tried multiple replacement batteries and had the batteries checked and they were good. What is really odd is that one of the calculators was brand new. Thanks, John

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Hi, i have the same problem with mine, did you manage to work out a solution?

Posted on Sep 10, 2009

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Hi John
I have had an ET66 in the past but lost it. Would you sell one of yours?

Posted on Dec 01, 2008

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Hi John

Can't help you with your query but I would be grateful if you could help point me in the direction of where I might be able to buy a Braun ET66



Posted on Mar 03, 2008

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Could be a manufacturers flaw.see if you can exchange them

Posted on Feb 11, 2008

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Needs to be added to a simple question on how DO you change the battery in this model ws-200h.The battery life was only a few months also.Surely your experts know how to change a battery in this...

Unscrew the four phillips head screws - the small section will come off. with a knife run the blade gently between the large section- if you pull you may break it. You will then find the battery on the circuit board. You will notice an open end and closed end around the battery. Push the battery out through the open end. DA DA - battery out.FYI - Battery is L1131. cheers

Apr 25, 2012 | Canon WS 200H Calculator

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My calculator has fresh batteries and will not turn on, it has normally worked before and now it just randomly stopped working.

Did you change the AAA batteries and the internal back up battery? It may sound unnecessary, but sometimes these devices are a little picky. I would also check that the contrast and brightness setting is appropriate. I fixed my dad's just by hitting second and up on the arrow to make the font show up again.

If neither of those work, try these:
(These will reset the calculator and erase the memory)

Remove one of the AAA batteries, hold down on the DEL key while reinserting the AAA battery. The handheld might display "Waiting...Please install calculator software now". If you get this message, the information in the "Correcting the Error Waiting" section shown below will help you correct the problem. Before trying that procedure, reinstall one of the AAA batteries again. This time do not hold down the DEL key.

Remove one of the AAA batteries, press and hold the [on] key for 10 seconds, release, replace the battery, then turn the unit on. Adjust the contrast.

Remove the AAA batteries for three hours. After the three hour period, reinsert the batteries and turn the handheld on. Adjust the contrast if necessary.

Jun 22, 2011 | Texas Instruments TI-83 Plus Calculator

1 Answer

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.

Jan 14, 2011 | Texas Instruments TI-83 Plus Calculator

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How do you change the battery on a ti-84 plus calculator

Turn the calculator over. About in the middle of the back of the calculator, there's a latch. It's above the mainly rectangular battery cover. Push the latch down toward the rounded end of the calculator and then pull the cover out toward you. The batteries are underneath.

If you need to change the backup battery, use a small screwdriver to remove the screw under the battery cover.

Nov 20, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

Change battery

For up to 1000 hours of operation, use Panasonic
LR-44, Ray-O-Vac RW-82, Union Carbide (Eveready) A-76, or equivalent battery types.
For up to 2500 hours of operation, use Mallory 10L14 or D357, Union Carbide (Eveready) 357, Panasonic WL-14, Toshiba G-13, Ray-O-Vac RW-42, or equivalent battery types.
1. Remove slide cover. Place calculator face down.
2. Using a small Phillips screwdriver, remove screws from back case.
3. Pull off back case.
4. Remove discharged batteries.
Caution: Avoid contact with other calculator
components while changing batteries.
5. Install new batteries positive side up, as shown on diagram inside case.
6. Replace back case, and then replace screws.
7. Press ' ! !.
Battery Information
The BA Real Estate calculator cannot hold data in
memory when the batteries are removed or become discharged.

Aug 18, 2010 | Texas Instruments BA Real Estate...

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I need to change the battery on the tI30-xa calculator. I need to know the size and how to change it.

Remove slide cover. Place calculator face down. Using a small Phillips screwdriver, remove screws from back case. Remove back case. Remove discharged batteries. Caution: Avoid contact with other calculator
components while changing batteries. Install new batteries positive side up, as shown on diagram inside case. Replace back case, and then replace screws.

May 19, 2010 | Texas Instruments TI-30XA Calculator

1 Answer

Changed battery but still displaying low battery and the dot is not displaying

Hello :

Try to change the battery once again . If that didn't help , then I would guess that the base where the battery sets is rusty or dirty . Try to clean it . If that didn't help also , then try to reset your calculator .

I hope that will help .

please rate !

Mar 30, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

Minimally used calculator drains batteries fast

The draining of batteries depends on usage. Turn calculator off when not in use. Use rechargeable batteries: Have two sets of them and change batteries before the ones in use are not fully discharged.
If you get tired of that, I suggest you have the calculator repaired.

Hope it helps.

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Energizer Silver Oxide 1.5V Watch Battery - EVR357-303TS

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- Jim

Jan 25, 2008 | Braun ET66 Calculator

2 Answers

Ti-83 plus

try changing the back up battery also. This generally helps. The next time you change your batteries, change them one at a time. don't take them all out at once. This won't happen if you do it like that.

Jan 19, 2008 | Texas Instruments TI-83 Plus Silver...

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