Try clearing CMOS with the jumper on the motherboard. (Computer should be off while doing this. Change jumper position for a few seconds then put it back.) Turn on computer, go into setup and load defaults, save and exit. See if it boots OK. If it still isn't booting copy an unmodded BIOS to a usb flash drive and plug it in. Turn on computer and press Alt-F2 (repeatedly if necessary) to launch EZ-Flash.
Dear Forum members, I seek the BIOS for: BIOS Type:Phoenix BIOS Date:November 7th 2007 BIOS ID:SROSA001.86C.0025.D.0711071458 -None BIOS OEM:R2100J7 Chipset:Intel 2A00 rev 12 It is for the SONY VAIO FZ340E/B. Thank you for your efforts!