During the mission, the cause was diagnosed as the rendezvous radar switch being in the wrong position, causing the computer to process data from both the rendezvous and landing radars at the same time.
dˈʊɹɹɪŋ ðə mˈɪʃən, ðə kˈɔːz wʌz dˌaɪəɡnˈoʊzd æz ðə ɹˈɑːndɪvˌuː ɹˈeɪdɑːɹ swˈɪtʃ bˌiːɪŋ ɪnðə ɹˈɔŋ pəzˈɪʃən, kˈɔːzɪŋ ðə kəmpjˈuːɾɚ tə pɹˈɑːsɛs dˈeɪɾə fɹʌm bˈoʊθ ðə ɹˈɑːndɪvˌuː ænd lˈændɪŋ ɹˈeɪdɑːɹz æt ðə sˈeɪm tˈaɪm.