i have encountered a problem in my TP 1200 COMFORT HMI,when we give 24v it will show up simatic hmi and after some time it will be blank,no booting up,when we given to siemens they replied that they cant repair it but one of my friend told me that if we flash it and put a new program then it will be okie..again one problem is their that flash program for this hmi is no available ...kindly guide
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