Pluged in smart cycle in t.v. and smart cycle will not come on please help

I had a similar issue. My Smart Cycle worked for a while, then it progressively became more and more temperamental, failing at unusual times, not turning on consistently, then finally quit powering on entirely. Turns out there was dirt & grime (maybe a little corrosion) on the game cartridge and plug. The solution -- clean with Windex and q-tips.

Here's the post that led me to that conclusion:
http://www.fixya.com/support/t317354-smart_cycle_fisher_price

And more on cleaning the cartridges and console plugs in general:
http://blog.pricecharting.com/2012/03/how-to-clean-video-games-consoles-with.html

If you have a TV with a "Game" setting like we do, set it to that and see if it helps (on our Sylvania TV it is a button on the remote that says "Game". Good luck!