With fresh batteries, when I turn it on, there is no visible response. When I push "<-" while turning it on, at the release of the <- key, I get 6 commas, 1234 flags, PRGM, and ALPHA indicators on the right side of the display. This lasts for about 1 sec before turning off. It doesn't fade as in the post below, but goes off instantly. If I hold down a number key while turning it on, the same display stays on until I release the number key. If I hold a function key while turning it on, the function is displayed for a second, and then the commas (etc...) display until I release the key.
Clues, anyone? Thanks, in advance.