Hi all. The extra ball button on my #NF stopped working after installing LED bulbs on the Playfield. I didn't mess with anything near that button, but I did try to take off the launch / no fear button and failed at it, so I stopped. I put the wires back on that button properly and it works fine, and the wires don't seem to be shared with the extra ball button, however, the extra ball button does not work now.

Any ideas?

Thanks.

The existing wiring wasn't touched, so it is what the manual says it should be. Here is the extra ball button.
20210103_090241 (resized).jpg

Unfortunately that didn't work. I also tried to jump the wires and it didn't work.

OK thanks.

It also seems as though the slingshots aren't working now either.

Any insight on where to start looking? The fuses in the back box seem to be ok.

It is.

Yes I did. Ok I will check fuses, thanks.

Correct, the game will start but the extra ball button and slingshots are not working. I will check the fuses again.

Thanks.

There is no led in the switch.

It seems as though the extra ball light, slingshots and kick back are not working.

Thank you.

So its looking like I fried the ULN2803 array on the CPU board. I am impatiently waiting for the replacements from Marco (and also Amazon - https://amzn.to/3b8pesg) to show up tomorrow!

I will certainly post the results, and I thank you all again for the help.

I'm very happy to say that my NF is fixed! The problem wad the ULN2803, I fried it while swapping the Playfield lights. Thanks again to everyone who helped me out!!

Thanks again for the help @mbt!

The chip is near the batteries on the bottom left of the backbox. Mine was socketed, I'm hoping yours is too. I beleive it's U20. Since that other link is sold out, try these https://amzn.to/3s3Eb5F

This is the location of the chip
20210103_202611.jpg

In this area
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