I use an imac G5 and it recently experienced a power failure. I tried to reboot it but the screen kept flickering and getting all messed up at several points of the rebooting procedure. Finally (after a lot of trying) I got to reboot it. The I found out that neither Wolfenstein, nor quake nor Enemy territory would start. The problem with the flickering screen sometimes appears when the imac is on, or during rebooting .I tried downloading the latest update and ever since I have an annoying fan noise (that I've read is common after the 10.3.8 update). I ran the hardware check and it came up with the error 2NVD/3/4: 2103 .Googling the error didnt much help. So...what am I to do?
