LG ctv model CT-25Q26ET
LOPT
6174Z-6012R JBK18Fault - Black screen, no picture or on-screen display. Sound O.K.
If I short the red, green and blue pins on the crt to ground, I get a full screen of that colour. During that time I can barely see a faint tv program picure.
Adjusting the screen control makes no difference to the brightness, but the focus control does make some differnce.
Is low EHT from the transformer the likely cause? I do not have a high voltage probe. After I turn off the ctv, I can get very little spark when I discharge the picture tube.
Other voltages from the transformer and the B+ appear to be O.K.
Can anyone suggest anything else I should check before ordering a new transformer?
Thanks, Russell Griffiths.