What do you think I should do?
Just go & buy a new TV or wait & see if it goes away permanently.
You know, I've been a field service tech for well over 20 years, and I've learned that usually when a customers ASKS if they should get a new TV....they're actually wanting a new TV for some reason or another.
You just made my job hard.
You see, I'm not one of these Techs that takes the easy way out. I know that the only reason to replace a TV is if the Plasma Panel is actually bad. And from your description of the symptoms, you would have to have a crack in the glass to get the flickering if the panel was bad. I have seen that. Picture quality as your partner mentioned could simply be a Low Def picture on a High Def TV screen, so I have to discount that as a symptom.
My job is to save you money. I look at the overall best route for my customer.
But I also have to LISTEN to what you want too.
That's why my job just got hard. If you're strapped for cash, fixing it is better. If it's OLD technology and doesn't fit your lifestyle, and the cost of a new TV is of no consequence....AND you just can't have an unreliable TV sitting in your home, then I'd probably lean towards replacement, and using the TV as the 2nd TV in your home.
I'd still fix it, but as the 2nd TV it can wait until the failure point becomes more obvious to us.
So, it's hard for me to make a judgement call like that. It's your money, and your time, and your personal desires and pretty much your call.
Hey....I want a riding lawnmower. I wanted a Camaro, and I'd really like to get a Samsung 3D LED. But my lawnmower works although my legs cramp up mowing the lawn, my Car works just fine although it's got some age to it, and my TV is an HD CRT projection unit that isn't as sharp as my wife's LCD TV set is....I struggle with those decisions too.
I could simply go into debt getting what I want, or I can fix what I can fix and replace what needs replacing.
You see how tough this just became?
Turn the TV OFF, then back on....and it becomes normal?
And this --
You stated - "...it also goes blank after a while".
To me, that's slightly different than "the screen is definetly losing its glow".
Is it? When it blanks, is the panel still lit?
I really think that one question will tell us a LOT about your problem. If it's lit but blanked -- that's the logic board. Turn the TV off then on...Logic too. Black panel....One of three boards. Logic is one of the three.
Symptoms tells us a LOT.
For you...you may have a TV set from 1492 that sailed with Columbus. That would be justifiable to replace it if you want 3D. Or if you have one that's EDTV like the 2000 to 2004 models were. I can't justify internet access on a TV, better to get it on a Blu Ray player.
So...what do YOU THINK? Replacement or Repair ?
Answer the question in BOLD and we'll be a little closer to the final analysis.