Question about Casio Boss Business Organizer

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Casio boss 5300 questions

can not see anything on the screen unless I turn the unit away from me on an angle. Will not take any input or bring up any info. Where can I get another owners manual? Took out dead batteries after 5 years, all at once and replaced all at once. Sorry. Reset. Nothing is happening!!!

What is this thing worth?

Thanks for your help.


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Would like to download my SF5300B to my PC. Do you have any connection to do this task, or any other cable to use to download.
Thank you.
My e-mail is

Posted on May 21, 2009

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If you can see something when you turn it at an angle I would suggest turning the contrast dial to see if visibility improves. As far as a copy of the manual, I found one here:

Good luck.

Posted on Oct 08, 2008


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Posted on Jan 02, 2017

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I Suppose that is Casio SE-S300 Model :
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Trying to obtain a manual for the SF-5300.

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Problem with Casio FX 260 Calculator

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Casio BOSS SF-5300

Once the DATA ERROR DISPLAY appears,You will not be able to INPUT or EDIT DATA, though you will be able to recall Data after pressing CLEAR to clear the error message.**YOU WILL

In order to return the memory to normal (allowing further input and editing of data), you must perform the RESET OPERATION to clear the memory of all data-Make sure you have backed up or taken a hardcopy of this information before Resetting or it will be gone and there is nothing you can do to get it back.Once you have RESET you can re-input the data you have written down.

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