[SOLVED]Blue led on with usb, red and blue on with battery

[Qvims]

So i just finished soldering and the crazyflie cant seem to pass the start up phase (motors not spinning), before i started soldering everything worked fine, i even updated the firmware without and problems.
When I connect it to the computer with a micro usb cable the blue LED turns on, but when i have a battery connected both the blue and red led turn on, the green led flickers on and then off again(with battery only). I may have damaged something since i soldered m4 wrong and had to re solder it. (everything seemed to work before i re soldered m4, as I didn't notice the mistake at first). Cant connect to client, cant charge.. Need help.

Thanks!

[atomicdog]

Try checking for shorts again. Use a magnifying glass if you have one.

[Qvims]

Thanks! turns out a small piece of solder was shorting out one component.. I am able to connect to the crazyradio and charge it now.
Anyway, looks like m4 aren't getting and voltage, so i'll have to do some more troubleshooting before I am able to fly, Thanks again