My tv is loseing its colour and brightness, any ideas what it could be??

Question

serious answers please not just....get a new one because i would like to find out whats wrong with this one first

Sorry, its a panasonic 32" quintrix, its about 5 years old or maybe bit more

Answer 1

It depends on the age of TV really. One thing my uncle showed me (and he's a total guru on household electricals - he's made his fortune on the design and manufacture of them starting work out of his garage) is that over the years dust can build up on the tube having got through the vents. Because the tube gets hot it burns the dust and turns it into carbon. The carbon acts as a conductor and distracts some of the signal away from the screen. He fixed an old TV of mine by taking off the back and carefully hoovering all the dust and carbon out. It worked a treat too!

Another possibility is that the screen is going. As you probably know, it's not just bog standard glass but it's got special phosphor dots all over it and over the years the phosphor dots can wear out.

Here's a little information on brightening a CRT - which should also work for your TV. It might just help you squeeze the very last life out of it - if you can be bothered!

http://www.repairfaq.org/REPAIR/F_tvfaq8.html#TVFAQ_007

Answer 2

OK here is what happens they pot allot of stuff in a CRT and it all goes in the neck witch is the small part in the back and its all kinda close well this stuff uses very high voltage and low power now the guns have an oxide layer on them and this layer over time starts to flake off shorting out the tubes thus lowering emissions

now that we know whats happening here is what you do

you have to hook the tube up to a CRT analyzer and well basically it runs a higher power signal through the tube than is possible under other circumstances and basically blows those flakes into dust and walla your TV looks good again but problem is 1 out of about every 8 it blows the guns apart too oops TV is junk and the other 7 work like new for years so find someone who has one it is much too exp to buy to fix your TV mine cost $5000 but i have made 20 times that using it but still too expensive to fix one TV

Answer 3

1. Hit the Personal Preference PP button on the remote or in the On Screen Display menu to return everything to standard in case someone has been tinkering. 2. Try turning up the contrast, colour and brightness. 3. If your TV is supplied via a scart lead from a set top box (freeview or satellite) then unplug the scart leads and plug them in again, giving them a little wiggle as you insert them. Cheapo scart cables can corrode and give sound/picture problems. You might want to do the same with the aerial cables too. 4. Try selecting PAL rather than RGB video input from external devices. 5. Some low emission TV tubes can be saved with a "booster" but this would need professional intervention.

Answer 4

Without actually seeing the picture it is only an educated guess and my first guess is that your CRT is losing its emission. Which to put it bluntly-- as some of our more enthusiastic novices on here might say ---- its gone bad --shot---stuffed ---or kaput, however a second guess is maybe the internal pre-set brightness wants adjusting, Hope so as that is easy to fix !!
Good luck Pete.
I have spent 45 years in TV repairs so I have had a bit of practice !!!
Hey that is also a good answer from Alan !

Answer 5

This sounds like the standard problem when your tube is on the way out.

Some repair engineers can boost the tube using the correct equipment. However this is not a permanent cure and will probably give you another 6 months to a year.

Sorry to say it.

It really would be better to replace the set. Second hand sets are very very cheap at the moment.

Answer 6

the excellent mixture is what you think of it rather is. fact... everybody sees the international a splash diverse, no to human beings see the coolest same color or gentle interior the coolest same way. that is like a fingerprint. I observed that on discovery.... the reason being your concepts is in comparison to the different concepts and interupts the indicators diverse. in case you flow with what the image technological expertise beginning place says is the ideal image maximum human beings think of everybody seems sunburnt. Play with the colour, assessment brightness a splash whenever you watch it is going to definitely you will get to what you think of is the ideal image. it rather is the main inexpensive and least perplexing thank you to do it.

Answer 7

could be what is known as a beam limiter fault.
this will reduce the electron flow in the tube.
check the obvious like contrast and colour brightness settings.

Answer 8

HAVE YOU MOVED IT AT ALL? EVEN A FEW mm'S ?
IF YOU HAVE MOVE IT BACK, PANASONICS ARE NOT "METAL FRIENDLY" I MOVED ONE ONCE COS IT WAS NEXT TO A FIREPLACE, THE LADY LAUGHED AT ME 'TILL I FIXED IT, THEN ACCUSED ME OF MOVING IT IN THE FIRST PLACE. OR.. YOU AINT GOT THAT LIGHT SENSOR THING ON HAVE YA? PANAS HAVE AN ENERGY THING GOING ON.
DOWNLOAD INSTRUCTIONS IF THEY'VE GONE DOWN THE BACK OF THE CABINET

Answer 9

sounds like could do with DE guessing ( static magnetics ), but may be the tube is on the way out , how ever you have not said what type of telly it is and how old ?

Answer 10

Sounds like a color tube issue, nowadays it would probably cost more to fix it than to send it in to get it fixed