The fault:

        Turn on,black screen, AC show light, press NIBP blood pressure measurement key, pump work well.

Maintenance analysis:

        Plug in AC power, ac indicator light, indicate that the power board has no problem.Press on keypad, have the sound, press NiBP key, pump work well.So the motherboard problem is basically excluded.

        After starting up, self-check image is normal.Then it goes into the system, and the screen is black, but you can see what's behind it, and there's a clear blue line.Therefore maybe the problem of the screen and the main board connection not well,.Changing the connecting line of the standby machine, the blue vertical line still exists.

         Finally, put the spare screen on the machine and start normal.So the fault is on the LCD screen.

VM6 monitor accessories:

        Main board, encoder, original battery, blood oxygen board, parameter board, power board, blood pressure module, display screen, keypress, high pressure plate