OK
I need a little more help.
The third avenue is completely closed because, i cannot replace this IC. (not technically but physically).
Two much Voltage from the power supply : You do not mean the socket in my wall... ? And the PSU of my PC is a relatively new one, except that all other parts of my PC is working with no problems.
So if this is the case, there is something on the PCB that cause this high Voltage. The only thing i know is what pins of the PCI is for -12V,+12V,+5V,+3V,Ground,IOPWR. But i do not know, exactly, how to use them to trace the current flow. I have a device by which i can "inject" Volts to the PCI, but from there, except from the connections, i am not sure how to continue to check if the power rails have a problem. I never did it.
For the excessive load on an output (load drawing too much current), what do you mean with load ? A device inside the IC (diode, resistor etc) or a device outside it, or both ? If it is a device outside of the IC, will it be heated up , too ?
I have the schematic of this IC