This phenomenon is samsung in June 2004 to September 2006, 510, 540 n, 710, 711, 712, 720, 911, 913, such as display because of using the N0vTEK NT68F63L and NT68F63LG MCU, widespread this kind of problem, is not pick up the signal from time to tome LOGO footage showed after signal or blank screen appears "not the best model", black screen or pick up signals. But the indicator light is normal at this time. 5fXservice manual download site
 5fXservice manual download site
Plus electricity blackout have two reasons: one is the high pressure plate backlit protection, one is the common fault of the such machine, plus signal black screen. But there is a difference between the two, the difference is backlit protection, observe carefully on the screen is dark. And common fault is completely black, not dark. 5fXservice manual download site
 5fXservice manual download site
 5fXservice manual download site
Samsung's such a disease, is the MCU hardware out of the question, the MCU procedure in the vast majority can be read out for backup. Just need to take a new MCU when maintenance, can use the program is copied to the new MCU. If the fault in the machine of MCU program cannot read, you need to download a MCU program, written in the MCU, welding and correct. 5fXservice manual download site
 5fXservice manual download site
If have virtual welding welding the pin when poor contact, will show the screen or light green, not blue light, on/off is invalid. 5fXservice manual download site
 5fXservice manual download site
The common fault of another expression is "not the best model", which don't pick up the signal "please check the line" of the message. Once connected to signal lines, it prompt "not the best model. 5fXservice manual download site
 5fXservice manual download site
Pay attention to. Samsung display when the input signal resolution and refresh rate than the monitor setting mode will pop up "the best mode" message. But there is a difference between the two, is of common fault in all black a prompt window appears on the screen, the normal tip is a prompt window appears in the image above.5fXservice manual download site