Re: Kenwood DNX570HD No boot Red Triangle Lit - Characteristic Fault?
I know this is an older thread but I figured I would also throw in my two cents. I have a DNX690HD, and I can't use it in the summer. As others have said, it is the BGA of the main chip on the daughterboard. It just can't handle the summer temperatures which i've measured up to 160f in the car. Which shouldn't be "that" hot for solder to deal with, but apparently they used the same manufacturing techniques as the first generations of the box 360, that got the red ring of death from the same problem....
fierygt
Member
Last Activity: 12-31-2023, 07:09 AM
Joined: 03-19-2013
Location: Nashville, TN
-
Re: 52LG50 Has Mind of its own
The 52LG50 doesn't really have "sustain boards". It's LCD, not plasma. But earlier in the thread, I did mention removing the connections to the inverter boards, and that will keep it on. And gfox mentioned lowering the brightness halfway allowed his to function. In this thread, we are not really looking for "board replacement". We are trying to pinpoint the component(s) where this problem exists, because people have replaced their mainboards, which fixes it for a while, only to have the problem reoccur....Last edited by fierygt; 05-15-2015, 04:24 AM.Leave a comment:
-
Re: 52LG50 Has Mind of its own
gfox, pm sent. I mentioned I wouldn't mind trying a 10w resistor first, if you wouldn't mind sending one of those, too.
Leave a comment:
-
Re: 52LG50 Has Mind of its own
Sure, sorry been super busy. I can PM you my address if you like. If it didn't resolve your problem, it might not resolve mine, but I still am curious if it will....Leave a comment:
-
Re: 52LG50 Has Mind of its own
Mine will cycle back on, after I turn it off. I will have to reinstall the power board, and solder back on the resistor, so it might take a few days to get back to you on the tests. (It's not my primary project at the moment). It makes some sense, when you turn down the brightness it "fixes it", as the problem seems to be in the power delivery to the backlights. I mentioned if I unplug the cables going to the inverters, mine would act normal. Other than the backlights off, obviously. But it would stop power cycling at that point.Leave a comment:
-
Re: 52LG50 Has Mind of its own
The cable I have been testing with doesn't, but I can see if I can find one with the ferrite core on it. I have bin full of those cables......Leave a comment:
-
Re: 52LG50 Has Mind of its own
gfox, for sure.Leave a comment:
-
Re: 52LG50 Has Mind of its own
budm, Yes, that is the power supply I am working on.
gfox, I haven't even gotten around to ordered it yet, just because of priorities, but I was planning to soon....Leave a comment:
-
Re: 52LG50 Has Mind of its own
"I replaced all the capacitors in the power supply, even the smallest ones, and it made no difference."
I ordered a complete kit of new capacitors for the PSU, even though none of mine looked physically bad, and replaced every electrolytic capacitor on there, besides the two largest ones, and it didn't fix the problem. I've researched the issue in other forums, and others have said they replaced the capacitors too, and it didn't fix this particular problem with this particular tv. Which is why I started looking in other places....Last edited by fierygt; 04-16-2015, 06:59 PM.Leave a comment:
-
Re: 52LG50 Has Mind of its own
I have the back cover off mine, right now, and I tried it without it, but it cycles on and off and makes no difference for me.Leave a comment:
-
Re: 52LG50 Has Mind of its own
There is a 5w 6.8 ohm white ceramic resistor, next to the black relay, near where the 120v line runs into the power supply. Mine is reading around 10 ohms, which assuming it has a 5% tolerance (it doesn't really say on it), would make it well out of spec. I have not yet replaced it, and still need to get one ordered to find out, but that is where I am putting my money at the moment.Leave a comment:
-
Re: 52LG50 Has Mind of its own
That is the timing control (t-con) board. It delivers the image to the lcd screen.
I have this same TV, with this same problem, and can't figure it out. I replaced all the capacitors in the power supply, even the smallest ones, and it made no difference. The original ones didn't even look bad, but I did it anyway. If I unplug the two connections from the PSU to the inverter boards, it will act 'normal', and stay on and turn off like normal, but obviously there is no picture. Another person said it might be in the mainboard, but that doesn't...Last edited by fierygt; 01-23-2015, 10:26 PM.Leave a comment:
-
Advice for installing aftermarket inverter...
Hello, my first post here, so go easy on me. I have an "AVT4028" generic universal inverter ([url]http://www.creatall.com/html_products/4-lamp-inverter-45.html[/url]) that I would like to install in an Acer H243H. The monitor has a hissing problem, which I checked all the capacitors, and didn't find any problems. The screen also will go black within a few seconds, due to this problem. So I'm guessing it might be in one of the high voltage transformers...but just installing a "new" inverter, bypassing the original one seems like the easier way to go for me.
My...Last edited by fierygt; 09-13-2014, 05:57 PM. -
Re: New Members - please post your introductions here
Hello, world!
Jason, 38, residing near Music City, USA.Last edited by fierygt; 09-13-2014, 05:32 PM.Leave a comment:
No activity results to display
Leave a comment: