I have a PIX 506 (not 506e) with OS 6.3.3. It stopped working today and I tried reseating all cables and powering back up. All that happens is the Network LED flashing and the Power and ACT LED's are off. The fan comes on immediatley. I have not hooked to the console with a laptop yet. When I turn the power button on the back all 3 LED's flicker but only the Network LED remains lit while the other two remain off. I have reseated the memory and nothing else. It is plugged into a UPS. Any ideas as I am no expert and need help bad.