TV Repair Questions? Ask a TV Technician
No problem, I've got a few hours before I have to be anywhere.
It is very old. I got this from my room mate about six months ago and she got it third hand I believe. I took it off her hands in exchange for fixing the capacitor issue.
I replaced the capacitors about two months ago and immediately upon testing to see if the original issue was fixed the second problem presented itself.
The red light on the power button will go from being solid to blinking when I press it, the front blue light will come on, the red light will blink until the screen turns on and then off immediately while buzzing, then the red light will stop blinking and stay off while the front blue light stays on.
I made sure when changing the caps that their polarity was correct but I could very well have made a mistake. I didn't want to meddle in the guts of the set more than I needed to and I wasn't sure I was proficient enough to diagnose the problem without possibly doing more damage. Does this seem like a likely cause of the issue?
The red light turns on then off at regular intervals for a total of four times before staying off.
Oh, sorry, no. It blinks four times total. On, off, on, off, on, off, on, off and stays off.
Okay, thanks. So something is definitely shorting out, then?
Any idea if this could have been caused by errors made when changing capacitors? Or another way of asking, if this problem existed would it have been unobservable due to the broken caps presenting instead?
Also, what do you mean by relay clicking?
I'm not sure I described my problems properly. The second problem appears very different from the first one. With the first problem the screen would never turn on, there would never be any picture or sound. It would just cycle repeatedly and make a clicking sound as if someone was turning it on and then off very fast before the screen could warm up. This was a known issue with this type of TV and matched may descriptions of blown Samsung capacitors. The ones I replaced were obviously bulging, but as I did not replace them all that could still be the problem.
With this second problem, however, the screen DOES turn on when you press the power button. However you only see activity on the screen for a second, accompanied by some buzzing, before it stays off and the red light stops blinking. Because there is actually activity on the screen I would think the original problem was fixed, but there is no something else not working properly.
So your comment that "the symptoms have lessened slightly perhaps" doesn't sound right to me as it appears to be a very different symptom. I am very confident that the original problem, along with the relay clicking, was not a power supply issue but a capacitor issue. And since this new problem presents quite differently I feel like it's not caused by the same problem of sub-par caps.
I'm sorry if I am making incorrect assumptions, I'm certainly not the expert here.
Awesome, thank you for laying it out for me! I see what you are saying now.