Support Wiping a Broken Phone

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http://androidforums.com – My wife dropped her phone and cracked the screen. I bought a new screen and attempted to fix it however ended up making it much worse. The phone powers on and the screen is back-lit but I get nothing on the screen. I decided to just buy her a new phone. I would like to sell the old phone for parts but need to wipe the data first. Since I obviously can't do it the normal way, my question is if I delete the microSD card will there still be personal information left on the phone? Any ideas on how to wipe a phone with a non-working screen? Thanks for your help! (General)