Help: W800i onlyirda light when try to power on

I got a SE W800i phone which only irda lights on when I try to power on. What can I do?

your phone is charged?

You mean this a blinking red led in the infra red port.
If yes, then look here:

REPAIRING EROM GUIDES for most sonyericsson phones

Nice day

Red Light blinking

- If it blinks slowely .. I think you have battery problem .. Charge it
- If it blinks fast , you have EROM error , you can fix it by flashing EROM
and do full flash

Most propably a EROM issue as mentioned above.. Could also be battery doh.. Test your battery in friends mobile, test their in yours.. Charge in different available ways: Charger, Usb cable /doesnt charge full..+ slower\.. might as well try a desktop charger..
EROM could be caused by taking out the battery when cellphone is on..

Anything?
Try hooking it up with Setool/XS++ and post a log..

Have a nice day (: