Hi all,

A couple of weeks ago, I've ordered the Fernandes sustainer FSK-401. I've installed it in my guitar and it worked perfectly.
Since I've recieved a new set of humbucker pickups, I opened up my guitar again and soldered it together. While I had my guitar open anyway, I also soldered some extra wire to the LED-light that's on the circuit board, so I could have the LED appear at the front of my guitar.
After that, I have put my guitar back together. Since then, my guitar doesn't work anymore. The LED Light also doesn't turn on when I plug in my guitar, like it did before this last change.
I have tried different things to make my guitar work again (like resoldering the LED to the circuit board), but none of them helped.

Does any of you have tips to get me to understand what is wrong with the circuits in my guitar? I could also post some pictures of my circuit board as it is in it's current state.
Hope anyone knows how to solve this.

I take it you soldered a resistor to the led light right? If not it will burn quickly.

Thanks for your reply,
There was a resistor attached to the LED already (on the circuit board). All I did was putting some extra wire between the existing LED and the circuit board.
I should be able to see it if it was burned, right? The small wire in the LED would then have a gap, right ?

Hope this helps.
Here are some pictures of the circuit board in its current state: