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give it a really good hover out mate, bulb everything that might clear it up a little if you can get into the services menu look for self-focus setting,or if not look for red/green/blue realigning setting.
If you are saying no red: The model indicated here Recoton Advent Advent Q1435A TV is a 14 inch set.
first it may be cheaper to replace than repair--That said if no red look to the small circuit board at end of picture tube (it plugs onto the tube).
It will have either individual output transistors or a single IC.
What (if only one color missing) I would look at is the bottom side which faces to the rear---a circle of solder connections--possible one is broken--there will be one for each red, green, and blue--not always easy to see but if any of the solder connections look cracked or even broken loose-----
your color engine is failing its also known as the optic block and they are very expensive to replace good luck google the optic block failure in these sets to better educate yourself with what your dealing with ok it most often blue that shows the failure but green and blue to and red
sounds like the linear adjustment is out of whack.....most projection type tvs, projection, lcd, plasma, have to be correctly aligned so that the color grids overlap each other to properly display the correct hue being created. you'd need the service code to re-adjust it, or have it serviced. also possible that one of the color grids is bad, but if you have all three (red,blue,green) colors showing on the entire screen area i would doubt it
why not use a known good monitor
in 1 minute flat the truth.
not only that you can move or bad monitor to another pc
and see if it works.
also the cable can be bad.
Check settings first to make sure no one changed anything out of the ordinary. Are the shadows that of a color or darkened shadow? It could be out of convergence, which can be corrected in the menu - or it could be low quality video cables to. Also, if there is no green, does a white color show up when you're in a menu mode (Red+Blue+Green = White Image)? If so, then the green picture tube is working and it's just a color adjustment, otherwise you may have to invest in a new green picture tube.
ussally when u get coloerd outlined this idicates ether a convergence or a focuse problem.. the green convergence has become shifted. not lineing up with red and blue.. this also could indicate a green crt problem.. my advice is to get a tech to check it out.. it could be a simple adjustment or a whole new green crt
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