The entire far-right column of keys does not function. Pressing any of these keys (NXT, right-arrow, 1/x, delete, divide, multiply, subtract, add) just does nothing.
I don't recall doing anything to the calculator (no drops, spills, etc.).
HP 48SX and HP 48GX calculators have a membrane which connects between
the internal circuit boards. This is a common failure point. The "ON"
button is often the first button to go out. The calculator can be
opened up can cleaned, but it is a little involved. Forutnately
someone has posted pictures and information on what to do.
There is a text file with information. The file is big because of the
pictures. Summary: Open the case, bend metal clips holding the
circuit boards together. Clean up any dust and the contacts.
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1 - Function Keys f1 through f122 - Configurable Function key fnDisable fn in the BIOSTo disable, or enable, the function key (fn) in the BIOS, do the following steps.
Press the power button to turn on the computer.
Press the f10 key to open the BIOS setup window.
Use the right-arrow or left-arrow keys to navigate to the System Configuration option.
Use the up-arrow or down-arrow keys to navigate to the Action Keys Mode option, and then press the enterkey to display the Enable / Disable menu.
Select the desired mode:
Disabled : Requires pressing fn key + f1 through f12 to use the action as indicated on the action key.For example, if Disabled , pressing fn + f11 will mute the sound as indicated on the key on this model PC. Alternatively, pressing f11 only will minimize and maximize a web browser if open.The action keys may vary depending on the model of notebook.
Enabled : Requires pressing only f1 through f12 to use the action as indicated on the action keys.For example, if Enabled , pressing f11 only will mute the sound as indicated on the key on this model PC. Alternatively, pressing fn + f11 will minimize and maximize a web browser if open.The action keys may vary depending on the model of notebook.
Press f10 key to save the selection and restart the computer.
The function key (fn) option can be reset at any time.
1 Press FUNCTION key once and DOWN ARROW twice. 2 Press RIGHT ARROW once. 3 Press RIGHT ARROW once. 4 Enter your fax number by pressing the number keys (max. 20 digits). • To insert a space between digits, press #. • To clear a mistake, press speaker . 5 Press START/MEMORY to enter the fax number in memory. 6 Enter your name by pressing number keys for each letter as shown in the chart below. Up to 24 characters can be entered.
Turn the stereo off by pressing the "source" button on the bottom left corner of the stereo's face. Press the "function" button, the lower of the two buttons to the right of the stereo display, until the clock appears on the display.Press the arrow keys at the far right of the stereo's face to adjust the time. Use the left or right arrows to toggle between hours and minutes. Use the up and down arrow to increase or decrease the hour or minute numbers. Press the "function" button once you have set the display clock to the correct time.
Fn or Function key is used for your F1 up to F12 keys. Ex. Fn+F5 is to turn on the wireless capability. Fn key is like a shortcut for the functionality of the machine. You can also adjust brightness by pressing Fn+Up or Down arrow and for the Volume Fn+Left and Right arrow.
First you must configure your calculator to perform 3D graphics Press MODE 1.The first line shown is Graph. Unfold the hidden menu list with the right arrow and choose Graph 5:3D 2. Press ENTER to validate.
Now you must define the surface you want to draw 1. Press the [diamond] key then [Y=] to get a list of function names, the first of which is z1 2. Enter the following function (or your own) z1=(x^3*y-y^3*x)/390 ( x cubed times y -y cubed times x) divided by 390. 3 Press ENTER.
Graph the function Press the [diamond] key then [GRAPH]
The graphing screen displays progress in %. When it is finished you will see a weird sombrero.
(first). Set up a function in the TI85. how? Step 1. Press the [Y=] key to open the function editor. Step 2. Type in the function you want in the Y1= line. Step 3. Press [2nd] [QUIT].
(second). Create a table of numbers using the Y1 function. Step 1. Press [2nd] [TBLSET] to open the table setup menu. On the line "Indpnt", highlight "Ask" and press enter. On the line "Depend", highlight "Auto" and press enter. Step 2. Now press [2nd] [TABLE] , type in a value for "X", and press [ENTER]. Step 3. Continue typing more values for X to fill up the table.
(third). How can I see more decimal places for the numbers in a table? Answer: Step 1. Use the arrow keys to move the highlight over the number you are interested in seeing to more decimal places. Step 2. Read the number at the bottom of the screen. You should be able to see anywhere from 9 to 14 significant figures for your number.
(fourth). Delete the numbers in a table by:
(The following procedure will work when the table setup has been set to ask for the values of the independent variable.) Step 1. In the table screen, check the bottom of the screen to make sure that the cursor is not blinking at the bottom of the screen. If the cursor is blinking, press the [ENTER] key to stop the cursor from blinking. Step 2. Use the arrow keys to move the highlight to the first number in the first column of the table (the "X" column). Step 3. Press and hold the [DEL] key to delete the numbers in the first column of the table. The entire table should become clear with this procedure.
To turn the ringer off (or on)
press the conf/ function key,
scroll to "ringer volume" using the up and down arrow keysand press the forward arrow key
press the down arrow key for line 1 and the up arrow key for line 2
select the desired ringer volume by pressing the up and down arrow keys or press the down arrow repeatedly till the screen says "ringer off?"
press the save key (right soft key) you will recieve a conformation beep.
you can exit programming mode by pressing the off key.
You're right in that the calculator thinks you have 19 data points. You need to delete the nine unwanted rows. After pressing EDIT, press NXT to bring up the second set of editing functions. Scroll down to each unwanted row and press B for -ROW to delete it.
Or else simply delete the Sigma-DAT variable in the current directory and start over.