My mk107 does not work?

i’ve just built my mk107 kit but nothing is happening.

did I break anyting?

How can I check this?

Hans

In order for us to be able to help you, you should supply more details.
Sharp and hi-res pics of both component and solderside of your assembly can help too.

Hi

We I connect 9V power to the board sometimes some of the leds light up.
When I press SW2 nothing happens
When I press SW1 the all go off




Hans

Soldering looks very poor. This is most likely the cause of troubles.
Carefully redo each soldering. Heat long enough for the solder to flow, but not too long to avoid damage.