Please help me. I was replacing the RAM on my 2.1 modded dell inspiron 710 with a phoenix Bios when my kid accidentally switched on the current. The computer which up to the memory change had been running smoothly cannot boot any longer. I ran the pre-boot system Assessment and get the following "Short DST short test- fail error code:1000-0141 No drive detected. I get the following during boot up PXE-E53 : No boot filename received. PXE-M0F : Exiting Broadcom PXE ROM. The primary Boot device, the harddisk is not in the boot menu and I can't change the boot device to an external IDE hard disk drive, CD rom or USB memory stick. The memory test is OK, I don't know whether it is the hard disk or the Bios that is the problem. Any little input is highly appreciated. Thanks .