HMD-A200, HMD-A220 (serv.man2) - Sony Audio Service Manual (repair manual). Page 11

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This monitor is equipped with a self-diagnosis function. If there is 
a problem with your monitor or computer, the screen will go 
blank and the 

1 (power) indicator will either light up green or 

flash orange. If the 

1 (power) indicator is lit in orange, the 

computer is in power saving mode. Try pressing any key on the 
keyboard.

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1

,

If all three color bars appear (red, green, blue), the monitor is 
working properly. Reconnect the video input cables and check the 
condition of your computer.
If the color bars do not appear, there is a potential monitor failure. 
Inform your authorized Sony dealer of the monitor’s condition. 

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1

If the 

1 (power) indicator lights up green, the monitor is working 

properly.

If the 

1 (power) indicator is still flashing, there is a potential 

monitor failure. Count the number of seconds between orange 
flashes of the 

1 (power) indicator and inform your authorized 

Sony dealer of the monitor’s condition. Be sure to note the model 
name and serial number of your monitor. Also note the make and 
model of your computer and video board.

1

 (power) indicator