last night i tried to direcly wired the motor turret to the board and still does not move....i thought that some wires to the connecter are somehow broken, but it's working fine. i replace the transistor that burn up, but still no movement, guess u were right the Mp4024 might be damage, i have spare board tonight i will try to replace it see what happen next, i do not know the terms of electronic languge what would u call the item mp4024 in elect languge terms, my country here ic transistor and every electronic parts here are cheap, u know how much does a transistor cost here in indonesia? Rp100 divided by Rp9300 us currency US93c.......maybe i would find here so that i can replace it rather tahn i buy it from mate it would cost me new tank in indonesia. thanks for the reply, tommorow i will post my progress, thank you very much i need more of your advise...