maintenance work of computer , laptop , ups and all types of printer installed at various divisions sub-divisions sub-stations and circle office under eudc-iii kesco . kanpur , electrical items : , maintenance of computer system and laptop ( including ram , processer and excluding motherboard ) installed in circle-iii office and its divisional/test offices , kesco . , maintenance of offline u . p . s . with replacement of battery , maintenance of printer ( all in one ) / laserjet / dot matrix/ scanner with all spare parts . , laserjet printer cartridge filling ( excluding replacement of drum ) , replacement of drum