Which ABB touch screen repair company is the most professional in Shanghai?

Shanghai BB touch screen repair
Which one is the most professional (National unified maintenance hotline: Feng Gong)
Touch screen repair
can solve common faults of BB touch screen, such as black screen, white screen, flower screen, and no response when pressing the touch screen Or slow response (poor touch), confusing content, inability to enter the system interface, no backlight, dark backlight, no characters with backlight, inability to communicate, no response to buttons
Common models of BB touch screens
: B,,, 3.3-,3-,-,,,,
,,,,,,-,,-,,-,-,,,
,,,,,,,,,,, etc
,,,,,/-,/-,
B, 3/-,/-,,,,,,,,B,
,3, etc.
Hunan , Tibet, Beijing, Jinzhou, Zongwen District, Changping, Tongzhou District, Guangdong, Guangzhou, Shenzhen, Zhuhai, Jiangmen, Tianjin, Fujian, Fuzhou, Xiamen, Quanzhou, Jinjiang, Sanming, Longyan, Nanping, Fuqing, Lianjiang, Zhangzhou, Shandong, Hebei, Shijiazhuang, Baoding, Tangshan, Henan, Liaocheng, Zibo, Binzhou, Weifang, Dongying, Laiwu, Jinan, Qingdao, Chongqing, Shaanxi, Xi'an, Baoji, Ankang, Tongchuan, Hanzhong, Weinan, Xianyang, Hanzhong, Xingping, Jiangxi, Nanchang, Ji'an, Sanyuan, Shanghai, Pudong, Huangpu, Jing'an, Changning, Hongkou, Xuhui, Putuo, Songjiang, Baoshan, Qingpu, Jinshan, Fengxian, Nanhui, Jiangsu, Nanjing, Jiangyin, Suzhou, Kunshan, Taicang , Wujiang, Tongzhou, Wuxi, Rudong, Qidong, Haian, Yangzhou, Jiangdu, Baoying, Qinzhou, Xuzhou, Fengxian, Yancheng, Dongtai, Zhangjiagang, Lianyungang, Zhejiang, Hangzhou, Shaoxing, Wenzhou, Huzhou, Jiaxing, Jinhua, Obligation , Yongkang, Wuyi, Anji, Taizhou, Changzhou, Anhui, Hefei, Anqing, Ma'anshan, Lai'an, Haozhou, Taihe, Huangshan, Suzhou, Tongcheng, Sichuan, Chengdu, Chongqing, Dujiangyan, Panzhihua, Chengdu, Guangxi, Nanning, Wuzhou, Hezhou, Hainan, Kunyang, Baoshan, Lijiang, Guizhou, Guiyang, Zunyi, Hubei, Wuhan, Yichang, Jingzhou, Suizhou, Liaoning, Shenyang, Jinzhou, Dandong, Dalian, Liaoyang, Heilongjiang, Harbin, Jilin, Changchun, Baicheng , Inner Mongolia, Qiqihar, Hohhot, Ningxia, Yinchuan, Qinghai, Xining
Maintenance
Process
Step 1: Learn the fault condition of the product.
Step 2: Analyze the causes of such failures based on the user's fault description.
Step 3: Open the product that needs repair
, confirm the damaged device, and analyze the feasibility of repair
recovery.
Step 4: According to the working position of the damaged device, read and analyze the working principle of the circuit to find out the cause of the damaged device.
Step 5: Solicit the user for maintenance
opinions and confirm the repair
price and delivery date.
Step 6: Find relevant components for replacement.
Step 7: Make sure that the product fault and its causes have been eliminated, and then turn on the power for testing.
Step 8: When the product is working normally, enter the system.