K800i will not turn on infa red light is on when charging

I had the same issue.
It started where the phone went in a loop of restarting, getting a white screen, then restarting again etc...
I resolved this by downloading wontan server client ( http://www.wotanserver.com/en/ ). You do need to purchase 1 credit in order to get an account. Follow the instructions (however, instead of holding down teh C button as instructed, try holding down keys 2&5 together) for this and it will resolve the phone not turning on/red LED issue.
I wouldnt recommend using the software for any other use as it can be, or it could damage the phone if not used correctly, but for this method, quite fool proof really.
I still had the phone restarting issue after this, however, i'm hoping to run the sony ericsson software to update the phone and hope that that works :)

Good luck. Hope this helps.

When i try to turn the phone on the phone will not turn on but a red light flashes on the inferred strip on the bottom right hand corner.

I had the same issue.
It started where the phone went in a loop of restarting, getting a white screen, then restarting again etc...
I resolved this by downloading wontan server client ( http://www.wotanserver.com/en/ ). You do need to purchase 1 credit in order to get an account. Follow the instructions (however, instead of holding down teh C button as instructed, try holding down keys 2&5 together) for this and it will resolve the phone not turning on/red LED issue.
I wouldnt recommend using the software for any other use as it can be, or it could damage the phone if not used correctly, but for this method, quite fool proof really.
I still had the phone restarting issue after this, however, i'm hoping to run the sony ericsson software to update the phone and hope that that works :)

Good luck. Hope this helps.