Regarding your "press the power switch for 10-15 seconds" comment, if you press and hold the power button for more than 4 seconds, a circuit in the chipset will hard power-off the system. It may be that this is why the motherboard was for sale on E-Bay From your standpoint, this is as bad as a hardware failure only an Intel technician can reload the flash from scratch. Anyway, if the ME's area of the flash is corrupted, the system is never going to run to the point where a flash recovery operation can take place. The Management Engine is one of a number of microprocessors in the chipset that is responsible for a whole bunch of capabilities including power-sequencing. One of the possible causes for the symptoms you are seeing is a corruption of the Management Engine's (ME) portion of the flash. OK, I don't want to scare you but, if clearing CMOS and doing a recovery of the BIOS doesn't work, you may have a permanent problem. In your case, I don't think re-seating the processor will help.When I remove the heatsink from my processor, I only unplug the fan if I need to move the heatsink well out of the way (like when I am removing the motherboard from the chassis).If the processor does reach a critical level, it has a thermal-trip circuit that will protect it by shutting down the processor (almost like a fuse, but one that resets when the processor eventually cools off). In this case, the processor has the capability to throttle its own performance so that it will take much longer to reach a critical level. Eventually, however, the processor will generate enough heat that it cannot be dissipated by the heatsink and silicon temperatures will increase. The heatsink provides a mass that will extract some processor heat and ambient airflow will allow some of this heat to be dissipated. While you should never power up the system without the processor heatsink attached, you will be OK for a while if you do so with the heatsink attached but the fan not plugged in. Presuming that your system is powered off, you can remove the processor fan cable from the motherboard connector at any time.This means that there is no power being provided on the ATX12V connector at all it is only the standby power rail on the ATX connector that is receiving power. If the system is connected to the wall but sitting in a "powered-off" (S4 or S5) state, no power is being delivered via any of the standard 12V, 5V or 3.3V rails. As I mentioned above, if the PSU is connected to the wall, it is providing standby power to the motherboard (it is this power that lights the green LED). It doesn't really make that much of a difference, but I remove the ATX connector before the ATX12V (4- or 8-pin) connector.You should do two things, (1) disconnect the PSU from the wall (the motherboard is getting standby power otherwise) and (2) remove the battery for 30 minutes.I've build systems for years but this thing is a challenge (for me anyways). I've been struggling to get this board (bought on ebay) up and running.
I'm thinking the board is bad or the bios is stuck in some sort of state. A button press just restarts fans and stop again. When I press the power switch for 10-15 seconds the "cycle" stops and nothing happens excepts green light. Even tried connecting a network cable to LAN to see if I could get this thing to boot from LAN or reset state. I've tried removing the battery to reset the cmos. There is a red led for AMT that is on and off as power seems to cycle. When connecting PSU, the CPU and system fans spin and stop continuously.
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