Posts: 774
Threads: 93
Joined: Aug 2005
Hi Victor,
Try pressing the ON key repeatedly while holding ENTER down.
If this does not work, turn every battery N cell upside-down. (no, it won't hurt your calc) and press ON for a few seconds. Place your batery cells in their right position again and press ON.
If this doesn't turn your cal ON in a normal way (i.e. [0.0000 ] on the screen), then remove batteries and let your calc rest over night, (or 24 hours if you can...)
Should none of the above work chances are that your calc is in need of service.
Cheers.
Diego.
PS. You should check for corrosion on the battery contacts (and clean it in case you find any) before trying the above methods.