zerolvera

no i dont hace PF lights, i will try to do the bypass. thank you

I clean the contacts, theres no dirty or oxide at all, and i assuming that the battery box is the issue, but i dont have atnother to test it, i will try to get one for test, i tried to connect 2 motors directly to the battery box and happened the same, but no whining sound from the motors.

ok, i will try celaning the bricks and the contacts, thanks!

I have the 8043 that had been store for nearly 5+ years, 2 years ago i put on it new batteries and try to run it but it started to move until loses power and stops and the motor started wining, so i put it apart and store it, 2 days ago i tried to build the model b of this set but had the same problem, when i use one motor it works fine but when i use both, tracks or actuators, it slow down and stops and start wining, i dont know what is the problem, me and a friend have tested the components and disasemble to see if something is wrong, but stil not see a solution to this problem. i post it on reddit whit a video, https://www.reddit.com/r/lego/comments/1dc1xqy/comment/l7w2e5r/?context=3 (sound on to hear the noise).