19 inch System 3

[Charlie]

Seems BR is brightness, T is tint, and CL is color level for the Sentry setting.

[zeno]

Charlie
You are 100% on controls. Try the br. If that dont do it rap around
the controls & see if it flashes. If not go for the G-2 aka Screen control
on HV transformer. The other on HV transformer is focus.
Dont turn the G-2 to high or you will get thin white lines.
Turn it up slow til you just see the lines then back it off.
In a darkened room turn down the pix & BL controls & make
sure there are no lines & the picture is blank or very dark.
The G-2 can effect bleeding also.
Good Luck

73 Zeno