My AC quit working just as it is getting hot. I figured on a leak but I have 70psi in the system at rest. Then I checked the fuses and relays and the compressor clutch engages as it should. So the compressor is running but I am getting no change in the high or low side. I am used to compressor failures being noisy and destructive and the system leaking out totally. Is it possible for the compressor to fail internally and not show the usual symptoms and if so what would be the cause? I'm just throwing this out there before I remove it and begin an autopsy and replacement.