Debilitated planets are weak in strength and they produce adverse result during their Dashas.A planet is debilitated in a native horoscope and if there is cancellation of debilitation then it will give benefic results.
A planet achieve neech-Bhang under following Conditions.
Planet in Neech Bhang Raj yog give setback and struggle during the first half of dasha and give benefic results in later half of the dasha.Like if there is salt in the Tea and you add sugar to make it sweet the taste of the salt will remain in the tea. If there is cancellation of debilitation due to above mention conditions the good results will be felt during the dasha but due to debilitation some bad results will be felt during the dasha.
In the horoscope shown in picture Lagna Lord Sun is Debilitated in Libra in 3H.But Lord of debilitation Venus is Kendra from Lagna..So there is cancellation of the Debilitation of planet Sun.The native will face struggle or setbacks during first half of the dasha but during later half of dasha benefic results/extra ordinary results will be felt.