YES IT WORKS !!! I had to connect a 5V wire and flip tx and rx ! And of course I had to power on sata connector during the hyperterminal CTRL Z, that I hadn't understood ! I've worked so hard that I have made photos ! Here is my resolution : For MAXTOR DIAMONDMAX 22 (SN STM3500320AS) with MX15 Firmware First of all : With MAX3232 adapter You have to connect RX to RX and TX to TX !! Hardware used : . standard PC with one serial connector (com1) . rs232 cord . max3232 adapter (rs232 to ttl) . ATX PC Power Unit . Sata Power cable from another open PC The photos This photo shows my assembly with ATX pc power unit : To make this ATX power unit works only when I connect a power cord, you have to shunt 2 wires of the ATX motherboard connector : The max3232 assembly : The final assembly with HDD : For HDD pins, you can use a wire from jumper from a pc motherboard (like the ones for switchs and leds) and flatten it with a plier, then it's solid to connect to : Summary . Connect rs232 cord to your pc and to MAX3232 adapter . Connect red wire and black wire from atx power unit to V+ and GND on max3232 adapter . Connect TX max3232 to TX hdd pin . Connect RX max3232 to RX hdd pin . Connect power sata connector . Put a paper card (or other) onto 3 pins motor hdd but behind hdd board (between), you have to pull off a screw to do that (the nearest from the motor) . Power on ATX power unit with a power cord, the d1 led of the max3232 blinking . Launch hyperterminal, set it, connect it . Power on the second PC where power sata on the hdd is connected to . Type CTRL Z and so the commands listed there : http://www.msfn.org/board/index.php?showto...8807&st=100 . When finished and HDD works, you have to flash your bugged firmware with a newer, I have used this one : link to the firmware iso from seagate, its a bootable iso ! That should work, I hope ... For me It worked !!! Thx Gradius, you rox !! What a lovely screenshot !! :