don't mind the erom or gdfs, if those are corrupted phone won't work at all. try to reflash with the latest firmware for W810i. read these treads:
http://www.topsony.com/forum/showthread.php?t=1494
http://www.topsony.com/forum/showthread.php?t=45
http://www.topsony.com/forum/showthread.php?t=1545
http://www.topsony.com/forum/showthread.php?t=1698
http://www.topsony.com/forum/showthread.php?t=1412
and try to flash it again.