Hi there, i had same issue with my CT60 a few years back, my problem was it was overclocked i brought the frequency back down and it worked fine. ALso i have heard this is also cause by a short circuit on CT60. Use a good magnifying glass with good illumination light and look at solder joints all over the CT60, you may have a loose solder joint or a short circuit, i would would first check your frequency setting's and lower it down and recheck, if same problem i would inspect all of CT60 solder joints, and even the Interface Bus on falcon for loose or shorted traces and solder joints. goods luck