Hi All, I just picked up a 2x 2.0 Power Mac with the issues in the title, was a cheap pickup so why not. Before I booted the machine I removed the battery and reset. I then power on: - Mac chimes - There is display on monitor, although the picture is garbled. I put this down to a possible heat issue as it looks like the artifacting from overclocking gpu's - Remove card - Replace thermal paste and thermal pads, reassemble card heatsinks, fan etc. I've done this a good number of times, with many different cards without issues so there is only slim chance of me having damaged the card. I then replace the card (Geforce 6800 Ultra) - No chime - No display - Loud fans - Rear optical light is lit continuously I've ruled out the following: - Ram is fine - Did not move it since initial boot - Cover is on - No red leds whatsoever - Reset CUDA - Done many times - PSU - Fans power on, board and card are powered Possibilities: - Dead battery - can't check, I don't have a meter handy, cant buy one right now its nearly midnight - Dead card - Fans on card are still running and when it removed and machine is powered on the only change is the fan speed in the case, they have slowed down - Clean out case - Very dusty, may have cause a failure somewhere bridging something. CBF right now because its nearly midnight here. Has anyone had the same symptoms? I've read some posts on this but I'd like to go for some basic checks before I go out and spend more money on this. Does this seem like an issue caused by the battery? Thanks in advance.