i need help loop crashing topic

i have HTC one M8 CID HTC__622 and MID 0P6B63000 it keep's restarting i try to install Custom Rom and same nothing happen and i change firmware with most all type of HTC One M8 and it nothing happen keep restarting and it restart in low power and in sleep mode i put it in safe mode as the technical support told me and it restarting and go through hardware test and it pass the test and i make it as 3 times continusly and it pass when i'm trying to make 4th time dailog box said the hardware will fail during to high temp
any one can help me on this
thank you