Sun (Sony?) GDM-5410 Excessive brightness
That would be the picture tube causing the problem then.
The G2 is directly controlled by the AKB as well as the base value of
the eeprom.
I am assuming that in later versions they reduced the amount the AKB
affected the G2 voltage.
As always make sure the standard stuff is good, video output power
supply voltage that could be low due to a weak or high esr capacitor,
etc.
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