Hello,
Put in new batteries and try again.
If new batteries did not solve the problem, the next thing to check would be the battery terminal.
If
the battery terminal is rusty, the battery power won't contact and the
calculator won't turn on. So, use a flat small screw drive to scratch
the battery terminal so that there would be contact.
If the above
is not the problem, the next to check would be the wire connecting the
battery terminal to the the calculator's main board. There is a wire
between the battery terminal and the calculator board. When the battery
is inserted, the power from the battery goes from the terminal to the
board through this wire. There is a possibility that this wire is cut
in-between or is loosing contact. In this case, you need to get a small
screw driver and carefully disassemble the calculator in order to check
the wire.
If the wire is intact, use a light brush to brush the calculator board as there might be dust on the board.
If non of the above helps, then it means the calculator is dead and needs a replacement.
Regards.
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