The power is always "ON" and some cases it will boot up and when WinXP Logo comes out it just stay there till you reset again your power (On/Off),once yo tryagain to turn it ON it will not boot up anymore and wait ..again.I thought before it's the processor maybe theres not enought ventilation and install a big fan on top of the heatsink and did not fix the problem..still hungs up...I will try to figure out how to removed the motherboard.