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We fixed a Seagate 7200.11 with a BSY error. (drive was no longer detected by our computers' Bios) We followed Gradius2's directions with some necessary mods to them. Equipment used (as labeled in photo) 1. USB to Serial Port cable ( RS232) 2. Radio Shack AAA Battery housing for two batteries 3. RS232 to TTY/CMOS converter for $5 at http://alldav.com/index.php?main_page=prod...;products_id=11 4. Two mini pin jumpers - taken from an old printer cable 5. Hyperterminal running on windows xp laptop 6. External power supply to run the Seagate hard drive http://yfrog.com/5giwonthewarj Notes/Deviations from Gradius' directions: A. Added ground wire. The ground pin on drive itself was too small to get a good ground connection. We soldered a wire (labeled A) from a ground pin on the TTY converter to a screw hole on the hard drive's motherboard. (Various points on the circuit board including the plug hardware of the TTY converter, that one would assume were ground, in fact were not grounded!) The only good point to make an easy solder contact on the TTY board was the pin in photo - labeled A B. In item B in the picture we have a black and red wire with a very messy splicing job. W spliced out bits of the wire several times. We think it is necessary to keep the Tx Rx wires very short. (When the wires were longer we got jibberish) It is our impression that if you have a VERY good ground connection and also a decent Tx Rx connection the jibberish stops. C. Using our particular brand of serial to TTY converter we established our connection with the hard drive using Rx -> Rx and Tx ->Tx (Opposite of what we were expecting) D. Hyperterminal: Make sure you follow the hyperterminal setup guide in this forum. Our drive is the Seagate 7200.11 500GB ST3500320AS. This drive communicates at a speed of 38400. The other drives affected by this lock out problem connect at various other speeds. Make sure you put in your particular connection speed in both hyperterminal and under device manager for your serial port (or usb to serial port converter) This also goes for the Com ports, whichever number you use has to go both in hyperterminal and under device manager settings. After everything is setup it is a good idea to check your progress with a simple hyperterminal test : By connecting the Tx and Rx wires to each other with an alligator clip or something, with the hard drive disconnected, you should be able to type a letter on the key board and see it show up on hyperterminal If this is the case then connecting to your hard drive via Tx Rx wires and a very good ground you should be ready to communicate. If you have a Seagate 7200.11 500GB ST3500320AS with Firmware SD15 that is not being recognized by your systems bios feel free to contact ditchawg At hotmail DOT com We are by no means experts, but after spending two months on this we hate for our efforts to go to waste.