[sdiy] Frozen TR-808

[epk]

Hi All,

First time poster, and still pretty green to the world of SDIY!

I just replaced the start/stop switch, 16 step switches, and the  
master volume pot on my TR-808.  After the repairs were completed it  
appeared to work fine, although after a few mins of testing and  
powering off/on the unit it stopped being responsive.  None of the  
Step switches light up in any mode, nor does the Basic Variation  
light change whether in A, A/B, or B mode.

Any suggestions are greatly appreciated as I'm a little lost on how  
to proceed troubleshooting.

Thanks!

epk