西門子840D數(shù)控面板黑屏維修，西門子PCU20黑屏電源故障維修，西門子PCU20維修

維修故障包括：按鍵損壞，電源板故障、高壓板故障，液晶故障、主板壞、上電黑屏、花屏、暗屏、觸摸失靈，不能正常開機、觸摸問題、按鍵問題、屏幕顯示問題（屏碎、花屏、白屏、黑屏等）、通訊問題（觸摸無反應、觸摸反應慢等）、電源故障、主板問題、系統(tǒng)問題等工控機無法安裝操作系統(tǒng)；工控機按下開關，可以看到指示燈亮，但屏幕無顯示；工控機開機屏幕出現(xiàn)英文或數(shù)字報錯，無法進入系統(tǒng)；工控機不識別光驅、硬盤、軟驅、串口、并口、網卡口等；工控機按下開關，沒有任何反應(無法開機)；工控機經常死機、掉電或自動重啟；工控機密碼遺忘，無法進入系統(tǒng)；工控機電池無法充電。

PCU20 PC處理器:
6FC5210-0AA00-0AA0   6FC5210-0AD21-0AA0  6FC5210-0DA00-0AA0
6FC5210-0DA00-1AA0   6FC5210-0DA00-1AA1  6FC5210-0DA10-0AA0
6FC5210-0DA10-0AA1   6FC5210-0DA11-0AA0  6FC5210-0DA20-0AA0
6FC5210-0DA20-0AA1   6FC5210-0DA20-1AA0  6FC5210-0DA20-1AA1
6FC5210-0DA20-1AA2   6FC5210-0DA20-2AA0  6FC5210-0DA20-2AA1
6FC5210-0DA20-2AA2   6FC5210-0DA21-0AA0  6FC5210-0DA21-0AA1
6FC5210-0DA21-1AA0   6FC5210-0DA21-1AA2  6FC5210-0DA21-2AA0
6FC5210-0DA21-2AA1   6FC5210-0DA21-2AA2  6FC5210-0DB21-3AA1
6FC5210-0DB22-3AA1   6FC5210-0DF00-0AA0  6FC5210-0DF00-0AA1
6FC5210-0DF00-0AA2   6FC5210-0DF00-1AA0  6FC5210-0DF00-1AA1
6FC5210-0DF00-1AA2   6FC5210-0DF01-0AA0  6FC5210-0DF02-0AA0
6FC5210-0DF03-0AA0   6FC5210-0DF04-0AA0  6FC5210-0DF05-0AA0
6FC5210-0DF20-0AA0   6FC5210-0DF21-0AA0  6FC5210-0DF21-2AA0
6FC5210-0DF22-0AA0   6FC5210-0DF22-1AA0  6FC5210-0DF22-2AA0
6FC5210-0DF23-2AA0   6FC5210-0DF24-0AA0  6FC5210-0DF24-2AA0
6FC5210-0DF25-2AA0   6FC5210-0DF31-2AA0  6FC5210-0DF33-2AA0
6FC5210-0AA00-0AA0   6FC5210-0AD21-0AA0  6FC5210-0DA00-0AA0  
6FC5210-0DA00-0AA0   6FC5210-0DA00-1AA0  6FC5210-0DA00-1AA0   
6FC5210-0DA00-1AA1   6FC5210-0DA00-1AA1  6FC5210-0DA10-0AA0  
6FC5210-0DA10-0AA0   6FC5210-0DA10-0AA1  6FC5210-0DA10-0AA1   
6FC5210-0DA11-0AA0   6FC5210-0DA20-0AA0  6FC5210-0DA20-0AA0 
6FC5210-0DA20-0AA1   6FC5210-0DA20-0AA1  6FC5210-0DA20-1AA0 
6FC5210-0DA20-1AA0   6FC5210-0DA20-1AA1  6FC5210-0DA20-1AA1   
6FC5210-0DA20-1AA2   6FC5210-0DA20-1AA2  6FC5210-0DA20-2AA0
6FC5210-0DA20-2AA0   6FC5210-0DA20-2AA1  6FC5210-0DA20-2AA1   
6FC5210-0DA20-2AA2   6FC5210-0DA20-2AA1  6FC5210-0DA21-0AA0
6FC5210-0DA21-0AA0   6FC5210-0DA21-0AA1  6FC5210-0DA21-0AA1   
6FC5210-0DA21-1AA0   6FC5210-0DA21-1AA0  6FC5210-0DA21-1AA2  
6FC5210-0DA21-1AA2   6FC5210-0DA21-2AA0  6FC5210-0DA21-2AA0   
6FC5210-0DA21-2AA1   6FC5210-0DA21-2AA1  6FC5210-0DA21-2AA2  
6FC5210-0DA21-2AA2   6FC5210-0DB21-3AA1  6FC5210-0DB21-3AA1  
6FC5210-0DB22-3AA1   6FC5210-0DB22-3AA1  6FC5210-0DF00-0AA0   
6FC5210-0DF00-0AA0   6FC5210-0DF00-0AA1  6FC5210-0DF00-0AA1
6FC5210-0DF00-0AA2   6FC5210-0DF00-0AA2  6FC5210-0DF00-1AA0  
6FC5210-0DF00-1AA0   6FC5210-0DF00-1AA1  6FC5210-0DF00-1AA1
6FC5210-0DF00-1AA2   6FC5210-0DF00-1AA2  6FC5210-0DF01-0AA0 
6FC5210-0DF01-0AA0   6FC5210-0DF02-0AA0  6FC5210-0DF02-0AA0
6FC5210-0DF03-0AA0   6FC5210-0DF03-0AA0  6FC5210-0DF04-0AA0 
6FC5210-0DF04-0AA0   6FC5210-0DF05-0AA0  6FC5210-0DF05-0AA0 
6FC5210-0DF20-0AA0   6FC5210-0DF20-0AA0  6FC5210-0DF21-0AA0 
6FC5210-0DF21-0AA0   6FC5210-0DF21-2AA0  6FC5210-0DF21-2AA0
6FC5210-0DF22-0AA0   6FC5210-0DF22-0AA0  6FC5210-0DF22-1AA0 
6FC5210-0DF22-1AA0   6FC5210-0DF22-2AA0  6FC5210-0DF22-2AA0
6FC5210-0DF23-2AA0   6FC5210-0DF23-2AA0  6FC5210-0DF24-0AA0 
6FC5210-0DF24-0AA0   6FC5210-0DF24-2AA0  6FC5210-0DF24-2AA0
6FC5210-0DF25-2AA0   6FC5210-0DF25-2AA0  6FC5210-0DF31-2AA0
6FC5210-0DF31-2AA0   6FC5210-0DF33-2AA0  6FC5210-0DF33-2AA0
6FC5210-0DA20-0AA1   6FC5210-0DA20-1AA0  6FC5210-0DA20-2AA0
6FC5210-0DA21-0AA0   6FC5210-0DA21-0AA1  6FC5211-0AA00-0AA0