transistor organ problem easy to solve

[mtwallet]

I found that organ for 20€
it's a Farfisa Matador-R
it was sold as non-working
I just replaced the fuse and it was back BUT, all the D's weren't working ; so here's what I did (if it may help)

nb. I don't know much into electronics

I opened the organ and identified the card reading A, A#, B, C etc...
then I turned on the organ

for each note, there is the same row of transistors
I used a small screwdriver and compared the D# transistors with the D's

I put the screwdriver on each transistor leg and then I found out that one of them -which was supposed to make a very quiet "D" sound- was mute
so I put it out of the card, brought it to my electronics store, then replaced it, and it works well now

I think many transistor organs may have this kinda problem
I already get a Philicorda fixed by doing that way

so if it may help...

[kourosh]

thanks was very helpfull