I have a toshiba cn32g90 with no picture or sound when I turn the power on I get a bright white line going horizontal across thhe screen almost to each edge then it slowly turns pink. I'm thinking it might be the high voltage supply going to the picture tube but am not sure. Does anyone have any idea?
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Re: tosjiba cn32g90 no picture or sound
Timm,What you have Is Vert Failure,Toshiba is Noted for Bad Conns On the Vert Ic,Pull the Back off and Gently tap with a NonConductive Inturment and watch the Sceen Look for Heatsinks and Tap on those,If you know,or you caqn solder do so ,Do run the tv for a long time with no Vert or it will Cause BURN IN in the Phophurus
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Same issue here. I kept plugging in the TV and it would flash the logo and go black. I disconnected the LED line from the power board, plugged the TV back in and the LED's all lite up and got great picture. Turned it off and on a few times with the power switch with no problem. Left it alone about an hour, came back, got the same symptoms all over again, Flash then nothing.
I changed out the Power Supply board....same issue, Flash of logo and black screen. Probably going to heave ho the set.
It sounds like the picture tube may be weak (because it's orange) but it going to half ascreen is not caused by the picture tube but likely a vertical circuit problem. If this problem happened suddenly (going orange) then the picture tube is probably good and at least worth bringing in for an estimate.
This RCA set uses the CTC187BD chassis. Look on the back of the set and to the right of the cable connector you will see 2 controls sticking out, one on top of the other. The top control is for focus and the bottom one is screen, or overall brightness. If these controls have been turned clockwise then you will have a bright, fuzzy picture with white lines (retrace lines) through it. Tune in a channel with white letters on the screen and turn the top (focus) control until the letters are crisp and sharp. Go into the menu and turn the contrast and brightness all the way down, and then turn the bottom control (screen) until you can just see the picture, just above the point where the picture is too dark to see. Go back into the menu and reset the contrast and brightness and the picture will be back to perfect.
Open up the back of the set but be very carefull. Notice a large black block with a large red wire that runs up to the picture tube. on one side of that large block where the thick red wire is comming out of are two controls, one should be marked focus or F and one should be marked screen or S. With the set operating normally and not touching anything else, slowly turn the control marked screen or S clockwish till the picture gets bright enough. If you go too bright the set will shut down or you see small thin white lines so back down on the control. then touch up the focus and your good to go. good Luck.