makvision m2929d monitor works but lost red help

security0001

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i have the monitor in a bbh pro and the green and blue are there but red is completely gone. other then that is seems to work. any ideas on why only red is gone. the monitor is dated march 2008. i have read that some i/c chip failure can cause a lost color. any ideas or let me know where to start checking. thanks for any help.
 
the tube used on these are known to lose a color....I'd check the tube out first!
 
are you referring to checking the guns in the tube with a crt analyzer??
thanks
 
i used the cr7000 on the tube and no shorts, but cutoff and emissions life were not as good as i would like to see, but it seems the caps on the tail board may be the problem so i ordered a cap kit yesterday for it and will replace the 1uf caps and the 1ufnp on the tail board and recheck and will let you know status after that.
thanks
 
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