Had 2 bars on the screen some time back,now can not use my lp as can see symbols, aphabets and nubber on the screen,i think the graphic card in got,i did open the lp and also removed the graghic card fruno:V000054110 (ATI 64MB), no know where to find one .
When you get all those letters and weird codes on the screen, does it do that at the POST screen? If so, the only way to really troubleshoot that problem is to have another ATI video chip to replace. Other than that, i would check the LCD display for a short. you would have to take the plastic cover off and look for the ground wire (use a multi-meter to determind this). If the ground is not properly secure, then secure it with electrical tape.
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Here is some help. Please read both parts attentively.
TO COMPUTE STANDARD DEVIATION AND 2-VAR STATISTICS.
know the theory. I will show you the key strokes
1-Var statistics Press [MODE][3:STAT] [1:1-VAR].
You are ready to
enter values in the X column. Enter a number and press [=]. Cursor
jumps to second number to enter. Keep entering numbers and pressing
[=] till all numbers are in. Press the [=] key after the
last one. Press
[AC] key to clear the screen. Press
[SHIFT] [STAT] (above digit 1.) then [5:Var]. Screen displays the
statistical variables 1:n ;2: x bar; 3: x sigma n; 4:x sigma n-1. Press
number corresponding to the statistical value you want, ex 1:n . The
variable appears on screen. Press [=] and it will be displayed. To
display another variable press [SHIFT][STAT][5:Var][ 1,2, 3, or 4] .
To access the sum of squares sigma x^2 and the sum of data sigma x
press[SHIFT][STAT][4:SUM] then [1: for sigma x^2] or [2: for sigma x].
Press [SHIFT][STAT][6:MinMax] to access minX and maxX.
For 2-var statistics To
2 variable statistics you press [MODE][3:STAT] and any of the
other regression options (except 1:1-Var). A two column template opens
where you enter the X and Y values. When finished entering data, press
[SHIFT][STAT][5:Var]. to access the different statistics. As I assumed
above, you should be able to
recognize what each variable means.
post is rather exhaustive as regards the matrix capabilities of the
calculator. So if the post recalls things you already know, please skip
them. Matrix multiplication is at the end.
Let me explain how to create matrices. (If you know how to do it, skip
to the operations on matrices, at the end.)
First you must set
[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or
[2:Matb] or [3:MatC] you get to choose the dimensions of the matrix
(mxn]. Once finished entering the matrix you clear the screen.
The operations on matrices are available by pressing [Shift][Matrix]
[1:Dim] to change the dimension of a matrix (in fact redefining the
[2:Data] enter values
in a matrix
[3:MatA] access Matrix A
[4:Matb] access Matrix B
[5:MatC] access matrix C
[6:MatAns] access the Answer Matrix (the last matrix calculated)
[7:det] Calculate the determinant of a matrix already defined
[8:Trn] The transpose of a matrix already defined
To add matrices MatA+MatB (MUST have identical dimensions same m and same n, m and n do not have to be the same)
To subtract MatA-MatB. (MUST have identical dimensions, see above)
To multiply MatAxMatB (See below for conditions on dimensions)
To raise a matrix to a power 2 [x2], cube [x3]
To obtain inverse of a SQUARE MatA already defined MatA[x-1]. The key [x-1] is the x to
the power -1 key. If the determinant of a matrix is zero, the matrix is singular and its inverse does not exit.
Dimensions of matrices involved in operations must match. Here is a
The multiplication of structured mathematical
entities (vectors, complex
numbers, matrices, etc.) is different from the multiplication of
unstructured (scalar) mathematical entities (regular numbers). As you
well know matrix multiplication is not commutative> This has to do
with the dimensions.
An mXnmatrix has m rows and
n columns. To perform multiplication of an kXlmatrix by
an mXn matrix you multiply each element in one row of the first
matrix by a specific element in a column of the second matrix. This
imposes a condition, namely that the number of columns of the first
matrix be equal to the number of rows of the second. Thus, to be
able to multiply a kXl matrix by am mXn matrix, the number of columns of
the first (l) must be equal to the number of rows of the second (m).
MatA(kXl) * MatB(mXn) is possible only if l=m MatA(kX3) *
Mat(3Xn) is possible and meaningful, but Mat(kX3) * Mat(nX3) may not
To get back to your calculation, make sure that the
number of columns of the first matrix is equal to the number of rows of
the second. If this condition is not satisfied, the calculator
returns a dimension error. The order of the matrices in the
multiplication is, shall we say, vital.
Its very easy to do matrix operations in FX 991ES This calculator can operate up to three Matrices at a time, namely Matrix A (Mat A), Matrix B (MAT B), Matrix C(MAT C).
First to do, is set the calculator in MATRIX Mode Its Easy Press MODE button and press 6. Your Display will show indication of MAT on upper side of screen to show now calculator is in MATRIX Mode
Now we need to Define matrices and set its dimensions. This product supports matrix of order up to 3x3. That is you can operate matrix of No. of rows=3 and No. of columns=3 To input matrix, Press SHIFT and then 4. This will Pop up Menu for Matrix. Now press 1 Your screen will show as this,
MAT A will be your First Matrix and MAT B will be your Second Matrix and so on. Press 1 , 2 , or 3 to select Matrix A , B, or C. here I will Proceed with Matrix A, so I press Numerical 1 Key
Next screen will ask you about the size of matrix.
Press UP or DOWN Keys to view options.
Press Corresponding Numerical keys to select corresponding order.
On Next Screen , enter values on each positions
Press UP, DOWN, LEFT, RIGHT Keys to move around in matrix and specify each element.
Now we inputed Details about Matrix A. If you want to specify other matrices (MATRIX B, MATRIX C) repeat STEPS 2 To STEP 4
After Specifying required Matrices, we can tell calculator to do operations with them.
Press SHIFT and then 4 and then It will show a menu contains
For example, i need to multiply Matrix A with Matrix B, i'll enter as
SHIFT + 4 + 3 to Input Matrix A X to enter operator (Here multiplication, You enter + - x / for corresponding arithmetic operations )
SHIFT + 4 + 4 to Input Matrix B
= To show Result Press UP DOWN LEFT RIGHT Keys to view extra fields, if any.
Next, enter a matrix into the calculator. To enter a matrix, press the arrow that points to the right two times when the cursor highlights letter "A." This moves the top cursor to "Edit." Press "Enter" to select the "Edit" option.
Next,, enter the matrix's numbers into the matrix on the calculator. Press "Enter" to move the cursor over one column. Press a button that has a dash symbol within parenthesis [( - )] to move down one row. Repeat the steps until the matrix is completed.
Next, Press "2nd" then "Mode" to go back to the home screen. Press "MATRX" to enter the matrix screen again.
Finally, press "Enter" when the cursor highlights matrix "A" then press "[x^ -1]." Your screen should read "[A]^ -1." Press "Enter" again to display the inverse matrix.
Decimal Point and Separator Symbols You can use the display setup (Disp) screen to specify the symbols you want for the decimal point and 3-digit separator. • To change the decimal point and separator symbol setting, press the MODE key a number of times until you reach the setup screen shown below. Display the selection screen. (Disp) 1. Press the number key ( 1 or 2) that corresponds to the setting you want to use. 1(Dot): Period decimal point, comma separator 2(Comma): Comma decimal point, period separator