My 14 samsong crt tv pic colour only red - Panasonic CT-36G34 36" TV

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if crt pic tube magnitized need to degausse with coil

Your tv could have one of several faults. None of which are to be tackled by anyone except a qualified engineer due to the electric shock hazard.the first problem could be the crt (tube) the second could be the componets on crt base circuit board ie resistors or ic.
With a tv 9 years old it may not be economical to carry out a reair.

PLS. seting tv in colour sys [exmp. PAL /NTSC/ SCEAM] so
set your colour system is AUTO . the set all colour system automatcly.

There are three color guns in a TV that make up the picture. Red, Green & Blue. It sounds like you have lost the green color gun.

You can get it rpeaired again, but your TV sounds like it is ready for TV heaven.

pin no 1 - Red colour signal (Red colour wire)
pin no 2 - Green colour signal (Green colour wire)
pin no 3 - Blue colour signal (Blue colour wire)
4&5 Not connected
pin no 6&7&8 are (Grounds)RGB Returns
9&10 NC
pin 13 Hohizontal sync signal
pin no 14 vertical sync signal
Not nessasry other pins

sounds lick you may have a dry joint in the powers or line o/p stage.

as a rare fault it could be the crt with an intermittant internal s/c. but you would notice the colour was tinted either red, green, or blue in the dark areas of the pic.

check for open resistor R302 on the CRT board. 150 ohm 1/8 watt SMT resistor, located at the base of Q305

it sound like you haveing troble with your red crt...could be crt socket circuit board or actually crt.

this sympton is characterized by the presence of red, cyan, green, magenta, blue or yellow colour in a supposedly plain white raster. proper colour reproduction cannot be expected if the raster is coloured. this symptom is caused by a poor white balance adjustment of by a trouble in the CRT, colour amplifier, color demodulation or colour output circuits. if the raster has a tint of red or cyan, check the R-Y output circuits and the first grid, second grid and cathode circuits of the red electron gun. but if you dont know anything about this, just bring it to a qualified service technician. good luck!