You need to separate everything no matter how much of a pain it is to do. You're making it so much harder for yourself by not knowing whether it's the circuit or the switch so first things first, take the TS808 out and connect it up directly to the input and output sockets with a terminal block, or even just wrapping wires together if you have to. Play the TS808 and see if you get the same problem with no switch at all in circuit. If you do then you know the switches aren't playing a part and you'll have to fault find the build. If he'd put a reverse polarity supply on it then the most likely thing to be damaged are the polarised caps or maybe the IC.
If the TS808 works fine on it's own then you know something in your switch wiring is wrong.
One thing that would cause you problems in the wiring based on the diagram you posted, although I assume you haven't done this and it's just an error in the diagram, you only have the the input sleeve, output sleeve and effect board B ground connected together, Everything else seems to be going to the ring of the input socket. Everything needs grounding with the exception of the negative terminal of the battery which goes to the input ring and isn't also connected to the DC adapter, then the battery is only in circuit when something is plugged into the input socket as you would expect.
hey mark... thanks for inputing, means a lot. well... i just tested the 808 with separate jacks and still no sound. that implies a mistake on the board, am i right?
i have the jacks grounded to the input jack on the enclosure, which is grounded to power and the board
Do any of the electro caps look damaged or bulged? As Mark said, probably best places to look for a fault are them and the IC, replace them and see whether that will get you any sound
the guy just sent me a pic of the adapter he used. freakin used 120vAC... i only have two of the extra elec caps. gotta order the other and the IC... unbelievable.
Nothing wrong with that adapter put polarity might have been reversed. I suppose it's one of those types where you can put the plug both ways and that determines the polarity. If it was plugged as positive centre, the opposite of what we normally use but what consumer electronics use widely, then it's sure to have caused some damage to caps and/or IC.
My friend once plugged my fuzzrite into positive centre supply. Soon, he's heard a loud pop and when I opened it, the capacitor was burst open. That's what wrong polarity does to you!
i see. damn, well i changed two caps and still nothing. guess i gotta wait for the other and the IC to find out... thanks for your help though, i really appreciate it. really been scratching my head over this
The last of your worries should be that 100uf cap, it's only for power supply filtering and thus nonessential, but useful.
LM833 will be fine there, some people even prefer it to stock 4558