西門子840D數(shù)控系統(tǒng)維修故障包括：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(jī)、觸摸問(wèn)題、按鍵問(wèn)題、屏幕顯示問(wèn)題（屏碎、花屏、白屏、黑屏等）、通訊問(wèn)題（觸摸無(wú)反應(yīng)、觸摸反應(yīng)慢等）、電源故障、主板問(wèn)題、系統(tǒng)問(wèn)題等 工控機(jī)無(wú)法安裝操作系統(tǒng)；工控機(jī)按下開關(guān)，可以看到指示燈亮，但屏幕無(wú)顯示；工控機(jī)開機(jī)屏幕出現(xiàn)英文或數(shù)字報(bào)錯(cuò) 西門子伺服電機(jī) 
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