Chifukwa 1: Kusuntha kwa mtunda wautali kwa mutu wa laser kuchokera pamakonzedwe.
Yankho: Kusintha koyambira.
Chifukwa 2: Zoyambira sizimayika ntchito yosuntha mutu wa laser kuchokera pamakonzedwe.
Yankho: Bwezeraninso ndikuwongolera koyambira.
Chifukwa 3: Vuto losinthira chiyambi.
Yankho: Kuyesa ndi kukonza chosinthira choyambirira.