Having a strange issue with a system I've been working with for almost a year. Recently I hooked up my system to a HDTV to play some movies and somehow since then my system is unable to power off. I go through the normal process of shutting down and it's clear that the OS is shut down, my screen goes blank, however the system doesn't power down itself. Holding the power button doesn't do anything either, and ends up restarting the system. The only way i've been able to power off my system is by using the on/off key on the back of the power supply itself! What's weirder is that once I've turned off my system, to turn it back on all I have to do is flick the PSU on from the back and the system regains power, however does not boot. I need to press the 'power' button on the front panel for the system to boot up BIOS and start working. Other than this my system is working just fine. Not sure what the source of the problem is, however I've checked the power and reset button attachments to the Mobo and they're correct, I've also tried switching them (just in case the power button was somehow stuck) and there's no difference. I've cleared CMOS, took out the motherboard battery and updated BIOS and nothing worked! Any help is really appreciated...
My system
Asus p7p55D mobo
GEIL 2x2GB DDR3 Ram
intel core i5
ato 4850 512MB
OCZ fatality 550W PSU
3 HDD
* this system has been working for almost a year and nothing was changed from the time since it was working properly to the time it was hooked up the to TV and these issues started occuring*
My system
Asus p7p55D mobo
GEIL 2x2GB DDR3 Ram
intel core i5
ato 4850 512MB
OCZ fatality 550W PSU
3 HDD
* this system has been working for almost a year and nothing was changed from the time since it was working properly to the time it was hooked up the to TV and these issues started occuring*