Hi I have the 7200.11 drive which recently developed the BSY fault. Following the OPs instructions I got: USB > RS232 cable RS232 > 3.3V TTL Converter Using Jumper Wires I connected the V and GND of the TTL converter to the 5V and GND of a Molex cable (using a molex > fan connector to make the connection) and then from TXD and RXD to RX and TX on the HDD The Converter is recieving power since the red LED is brightly lit: whole setup (low quality srry) My problem is I can't get any output at all from Hyperterminal. My USB > Serial cable drivers were installed and under device manager came up as COM5, but when trying COM5 I get no output whatsoever (Ctrl-Z does nothing) So I tried doing a loopback test, but not sure If I'm doing it right. I plugged a jumper wire from the TXD to RXD on the TTL board and then tried typing in Hyperterminal, but still nothing: Am I doing something wrong or is there a problem with the Converter I bought or the USB>Serial cable???