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I have a Toshiba 30" tube TV (30HF83). The HD picture is fine but now when I tune back to the basic programs the picture is purple and green.

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  • rnbrown Oct 09, 2008

    I have a Toshiba 30" tube TV. I have a cable box with HD. The HD picture is fine watching TV and when I play DVD's the picture is fine. When I switch back to standard TV the picture is purple and green.

  • rnbrown Oct 09, 2008

    I have a 30" Toshiba HDTV tube TV and cable with HD. The HD programs are fine but the standard are purple and green.

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First off I need to know exactly what you mean by basic programs? Is it the same box just different channels? Once I have more information I can assist you further. Please don't request more help until I am able to do so. Also what cables are you using to hook up these "basic programs"
Thanks,
Lee

Posted on Oct 09, 2008

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The colorization is probably magnetization of the shadow mask of the screen. The horizontl lines are from loss of the vertical blanking function (that stops the visibility of horizontal lines during the vertical scan of the raster).

So, first: Try deguassing the screen. If the deguassing coil on the set is working properly it should gradually remove the magnetism by switching the set on, leaving it on for one minute, then off, then repeat. If you have a loudspeaker (most often a subwoofer) nearby the tv, move it further away.

For the lines, the only way is to have a qualified service tech repair it. The blanking circuit is complicated in new sets (old sets it was merely a capacitor that needed to be replaced, but today it is buried in an chip function). You might try a hard reset to see if that help. Merely unplug the power cord for 4 hours.

This may help..... The age of the set precludes spending alot of money but check out the above suggestions to see where it leads. If the degaussing coil in the set is not functioning the repair is probably more that one might want to spend on a set of this age.

I like Toshibe products. Even at this age I wouldn't hesitate to fix it if it could be done for a very reasonable price, however.
this is degaussing problem
keep tv off for half an hour and if you have changed the direction keep it as it was.
if any magnetic thing is there near to tv remove it like speaker or headphone etc.
hope this will help.


Posted on Oct 09, 2008

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Standard-definition TV signals (about 480 visible lines) are blown up to fill your HDTV screen (anywhere from 720 to 1080 lines). The original standard-def TV specifications were optimized for smaller screens than are common today.

THE FIX: Ask your cable or satellite installer to check if DTV signals are strong enough for your set-top box. If they're too wimpy, a commercial-quality inline amplifier (about $80) will provide the missing oomph. If you receive digital TV signals off-air, install a preamplifier (about $60) at the antenna to boost signal strength

THE FIX: If you haven't bought an HD set yet, here's a reason to wait: Future sets will be better at upconverting images to HD. Meanwhile, outboard video scalers can convert a 480i signal to 1080p. Models from Lumagen and DVDO range from $1000 to $2500.

Posted on Oct 09, 2008

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Are you using a satelite dish or cable? Try to play just a normal DVD and check if the same problem occurs. If it does, one of the bulb is needs to be checked. What you can try initially is unplug the power of your TV for about 2 hours then plug it back in. Check if that fixes it.

Posted on Oct 09, 2008

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