How have the courts dealt with a timely notice of appeal?

On September 24, 2015, appellant filed a timely notice of appeal. The notice of appeal seeks resentencing on his conviction for violation of former section 12021, subdivision (a)(1). Appellate counsel filed a brief asserting counsel could not identify any arguable issues in the case. (People v. Wende, supra, 25 Cal.3d 436.) The brief states that on September 27, 2000, appellant was found guilty of criminal threats. The brief does not address a conviction for violation of former section 12021, subdivision (a)(1).