Palatino VE-500 Pickup Problem

Hey all, I just bought a EUB, Palatino VE-500. I got it home and played through headphones, sounded fine. Then I adjusted the string height and now the sound is thin, tinny and quiet. I tried plugging it into my amp, sounds just as bad. I checked the battery, and I considered taking off the strings and bridge to have a look at the pickup. Did I break it? I might have to take it back to the store to get it fixed. Any ideas/ help would be appreciated. Thanks

 

Possibly, I'll double check when I get home in a few hours.