Hi Gang, I have a ST3500620AS with the BSY error. I tried for two days to connect to the drive's command prompt using the 3V CR2032 battery. It didn't work. Finally got the command prompt by connecting the PCB to 5V from the power supply. Don't bother with the battery, it's a time waste. Sadly, after I spun down the drive with the "Z" command, either my TX or RX came loose as I was screwing the board back onto the drive. I don't think I shorted anything with the screws, but I may have. Either the RX or TX came lose, which I hastily reconnected. Now, after hours of cursing I still can't get back to any command prompt. I'm hoping I didn't fry it, but I ordered another board via EBay, just in case. This is a drive for a client of mine. I ain't looking forward to telling him about this... Any advice on a possible save would be appreciated. Thanks. RF.