A Study of JNJ-1761981 in Participants With Solid Tumors

Part 1: Individuals with a diagnosis of locally advanced or metastatic disease (solid tumors except tumors of the central nervous system [CNS]) who have previously received available standard therapy and progressed, or cannot tolerate standard therapy, or for whom there is no standard of care per regional guidelines

Part 2 Cohort A: Individuals with histologically or cytologically confirmed metastatic tumors of adenocarcinoma or squamous cell carcinoma histology, for which any platinum-based systemic regimen is considered a standard of care (per national comprehensive cancer network [NCCN] guidelines) and whose disease has progressed after standard therapy

Eastern cooperative oncology group performance status (ECOG) performance status of Grade 0 or 1

Part 2 Cohort A participants planned to receive optional cetrelimab (participants not meeting this criterion may still be enrolled in the study but cannot receive cetrelimab): Thyroid function laboratory values within normal range except for participants on thyroid hormone replacement therapy