The system log is below. The symptoms are as follows:
1) Screen flickers on boot and flashes lines
2) After being powered off for a while display will not turn on (restart usually fixes it)
3) If left on there are no issues
Jul 18 04:14:35 localhost kernel: NVDANV10HAL loaded and registered.
Jul 18 04:14:35 localhost kernel: AppleRS232Serial: 0 0 AppleRS232Serial::start - returning false early, Connector or machine incorrect
Jul 18 04:14:35 localhost kernel: PB5_1_PlatformMonitor::registerConSensor - type 4, csi 3, subsi 5
Jul 18 04:14:35 localhost kernel: ASC::checkProperties ERROR: failed to find platform-set-frequency-high
Jul 18 04:14:35 localhost kernel: ASC::start ERROR: failed to find the properties
Jul 18 04:14:35 localhost kernel: [HCIController][start]
Jul 18 04:14:35 localhost kernel: PB5_1_PlatformMonitor::registerConSensor - type 2, csi 5, subsi 0