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Re: very dark picture on TV
Try restoring all factory settings. On your remote, press the reset button twice. If that doesn't correct it, then you'll probably need a repair technician. For more info, consult your owners manual, which is also available at
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THE TUBE IS CARBONIZED -IF YOU HAVE A TECHNICAL KNOWS PUT 9V CA or CC IN FILAMENT AND A LAMP MAX 15WATTS IN SERIE WITH ANODE AND RED GREEN BLUE CATHODE (ONE AT TIME) -OFF FILAMENT AND YOULL SEE SPARKS INSIDE THE TUBE WHEN DESCABONIZE. REPEAT AT LEAST 3 TIMES
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 tv needs repair one of the transistors on the neck board is bad..the neck board is connected to the picture tube end inside the tv..but be care full as it stores very high voltage.if you are not a tech have a tech look at it.
there should be 5 or 6 preset on the crt(tube) base 3 of them should adjust red /green blue in the white aera and the other 3 adjust re/ green /blue in the dark aera make these adjustment with the colour turned off.
Sad to say that this is most likley a low crt the blue gun as gone low.
The set is probably magnetized and needs degaussing (demagnetizing). All CRT type TV's have an internal demagnetizing circuit that is engaged when the set is first turned on after being off for the day. If this circuit is working then you sometimes hear a "bonk" sound (about 1/2 a second long when the set is first turned on. If this circuit isn't working the set will become magnetized over time and will have to be degaussed using a degauss coil available at a TV repair shop (cost aprox. $35.00) and you should have the circuit checked at the same time. A set will also become magnetized if a large speaker (magnet) or motor is close to the TV. Be sure to vote/rate me if this helped Thanks!
sounds to me that your picture tube needs rejuvenated.
You will need to get it done by a tech.
mechanical doesn't mean a thing when it comes to electronics.
Mechanics when working on electronics, end up costing more damage when you end up taking it to a tech.
First you can up the screen voltage, by finding the HV transformer. It has Screen and Focus control on it this it the Transformer that is in back of set and has an anode lead going to Picture tube. Come up on the screen control slowly and if the picture brightens with vertical lines then it's too high, The red problem is a small transistor that maybe located on the CRT board. It's probably shorted. There are about 3, each going to the different colors Red, Blue, Green.