RE: K2600RS Blue Screen but power and clock crystals good

During additional testing, I discovered the Power_Good line was pulsing
negative at 120 Hz. I traced back the sample to a unregulated DC rectifier.
Pulling that line high caused the K2600 to boot up.
I think it's dried out capacitors. So I'm replacing all capacitors in the
power supply. The large one, 33,000uF, is reading 21,000 on a GenRad
Digi-bridge.


[MW]  Today, I came into the studio and the display info was gone and only
the
blue seen backlight was visible.

If I power down and power up, after a delay, I hear the hard drive spin up
and head seeking, but the display remains blue/blank.