Radio Lights flashing after jump start

My radio equalizer lights (3) are flashing, and the radio will not power up. The battery died (trunk left open for 2 days), and I jumped started the car. Everything is working fine, except the radio doesn't power up, only the lights flash on the equalizer. The 4 disc CD loader will power up, and I can load/unload CDs...but the radio remains blank. Please assist!