Digitech whammy 4 problem - wont turn on

[Reno]

Hi guys
i got this problem with my whammy, one day it just stopped working, most of the time when i plug the power nothing happens, only bypass
and sometimes when i plug it all the leds or some lit, but no sound

i bought a new power supply but its still the same

what could be wrong?

[phector2004]

The "most of the time/some of the time" thing sounds like a bad connection... if it were "all of the time" I'd guess components blew up, but LEDs lighting could be a good sign  

Have you opened it up yet? Hopefully it's something trivial!

Edit: Oh, and did you do a true bypass mod to it? Or does the original bypass work?

[space_ryerson]

One place to look is to test the voltages coming out of the regulators. You might be able to cull some information from this thread.