Since 10.3.4, my G4 does not wake from sleep

[geeyesgee]

Ever since I upgraded, my G4 (hooked up to a 21" studio display) does not want to wake up from sleep mode anymore no matter what keys I pound on. I've had to press the restart button everytime it went to sleep so I've set it to never sleep. Am I the only one to have this problem? Have I done something wrong?

Any advice would be appreciated.