SY-41CL lock up current drain

[aurelio]

(02-10-2017 09:11 PM)Monte Dalrymple Wrote:  

(02-10-2017 07:34 PM)aurelio Wrote:  Thank-you Juergen, I asked it because.........
..........my calculator is again locked with "all @s"

1. Remove the batteries.
2. Press the "ON" button (to discharge the power supply caps.)
3. Insert the batteries.
4. Press the "ON" button.
if the display doesn't say "MEMORY LOST" try the following:
5. press backspace
6. press SHIFT "4" (if the machine BEEPs it's a display problem.)
7. press "ALPHA" "T" "U" "R" "B" "O" "X" "ALPHA"
8. press backspace (and the machine should come alive.)
9. turn the machine off and the press backspace-ON to get "MEMORY LOST"

Hi Monte, performed the 9 steps unsuccesfully

I've already tryed to discarge the caps with the "ON", as I read in the previous
when I insert the battery pack the calculator seems dead, but pressing in the middle or in the bottom of the case both sides I get all@s pressinf again is dead...
but when the display shows all@s the calculator does not respond
"ALPHA" "T" "U" "R" "B" "O" "X" "ALPHA" I suppose is to be pressed when the calculator is "on", I mean with the @s .....by teh way nothing even when blank

edit
pressing SHIFT "4" if the machine does not BEEP!