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Re: tashiba projection tv
Could be a tube, but due to the model I would say something amiss in the red drive circuits Usually panasonic has blue tubes and green fail first. Try switching the Red RT socket with the green. if it still comes red then its in the tube, If it comes on green instead of red you know its in the drive circuits not the tube. Hope this helps let me know if you need anything further.
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Tv have halo pictures and dulls colors?Yes,the tv have bad Coolant chemicals on those colors guns R,G,B CRTS tv Tubes.Must replaced those CRTS Coolant chemicals on those CRTS tv tubes.Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a Coolant kit to replaced those CRTS tv Tubes coolant chemicals.
Sounds like a bad red projection tube, disconnect red tube socket and try again if tv stays on reconnect tube soket and adjust screen controls on front of tv under the front panel which you will have to remove to do any of this. There are six adjustment controls 3 are for focus for each color and 3 screen controls for each color. Look close at the black plastic control module should be labled R G B for focus and R G B for screens. Good Luck!
the picture tube has three color production units (bulbs) red, yellow and blue.....since these three colors can be combined to produce almost any color. as you have specified the red bulb might have damaged due to one of the following reasons. 1.continuous usage 2. keeping your tv in standby mode for a prolonged time. the only thing you can do is call a technician and get your damaged part replaced. remember please do not try to disassemble the unit yourself.
Normal color picture is composed with 3 colors R-G-B (Red-Green-Blue). Picture turns Red means: Missing Green and Blue colors (many reasons: bad contacts, projector tubes dead, and other...). Try to give some "tabs" to diagnose ... I don't know what is the type of your Projection TV, how long you owned it, to have more idea.
When a tv (Rear proyection) shows this coloration is the meanning that the red color is not there (the red color is generated by a red CRT). Now it can be really bad not having the tube working but before conclution make sure of this: (and if the red color gets back then the tube is ok)
is this condition the same in all inputs? or the picture looks ok with a different video source (VCR, DVD other)
are the menu letters same as the picture looks or are they fine?
If we cannot see any red color back with this testing, still chances that a technician find an electronic problem that make the tube to be off. so don't rush conclusions and get to the end to save the tv with out replacing the red tube, but if all was done and nothing then the tv needs the tube replacing.
When ever a tube starts to short or is shorted set always will have over bearing drive lines then shut down like RED if it was bad, set would come on long enough for red lines across set then shut down this is the same with all 3 tubes.Also if you think it might be green tube disconnected green CRT board on neck of green tube if set comes on and plays then it is green tube do all 3 tube this way one at a time this will tell you if you have other problems.