Cannot enter code on philips 22dc594/62s ?

Hi, after battery change the external display showed code. When I finally found the code in my papers, the diplay isn't showing "CODE" anymore. The radio looks dead, only the power button light is on. The Renault hotline couldn't help.

Is there a way to reset it, so it will accept the code again?

77 00 412 006 --B
philips 22DC594/62S FD 02 97 02 8007438
9022 215 94628
MODEL 22DC594/62S
PROD NO. FD0297028007438


Thanks

lois
December 2011