Hello everybody, I have a LG 60PZ550 Plasma TV that keeps turning off by it self 1-2 mins after turning it on. Any ideas what can be causing this problem?
Thanks in advance.
Thanks in advance.
-
Last edited by trophymechanical; 05-18-2015, 05:50 AM. -
Re: LG 60PZ550 Plasma keeps turning off
Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem -
-
Re: LG 60PZ550 Plasma keeps turning off
I don't see a leaking or bulging caps.Attached FilesComment
-
-
Re: LG 60PZ550 Plasma keeps turning off
Pics of ALL the boards and one of entire layoutComment
-
Re: LG 60PZ550 Plasma keeps turning off
You'll need to monitor Vs, Va, VSC, -Vy, and VZ-Bias as well as check PS-On and Vs-On etc....
--One or more of those should give you a clue, assuming you've checked for the obvious such as dry-joints on the ERC coils etc....TELEFIX
How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
http://www.irf.com/technical-info/appnotes/an-1088.pdf
PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!Comment
-
Re: LG 60PZ550 Plasma keeps turning off
Thank you guys, I am going to take a look.Attached FilesComment
-
-
Re: LG 60PZ550 Plasma keeps turning off
Has there been any updates on this thread? I have a 60PZ550 that is having similar behavior issues. Originally it would black out the screen for a few seconds (no sound/picture for appx 3-4 seconds) and come back on (but no click and standby light). This was occurring between every 30-60 minutes and right when I took it apart, was doing it every 30-60 seconds.
I took the unit down (from the wall) and apart and looked for bad caps / burned (obvious) physical damage and found none. I cleaned all the dust out and re-assembled.
Now the unit has good/bad days where it "just works" some days, and other days it will decide to randomly turn off (different from original issue), where the actual stand-by light comes on accompanied by the audible "click" of the set turning off. This sometimes occurs every 30-60 minutes and sometimes will happen 3-4 times a minute.
I have tried other options, such as: Using different HDMI input, using the built-in-TV-tuner, hiding the remotes (incase false input from a remote), factory reset (via menu).
I feel I have a failing component here and I have NO CLUE how to even diagnose this.
Anyone have any suggestions?Comment
-
Re: LG 60PZ550 Plasma keeps turning off
Read alastairs post above.
Alternatively connect these 2 holes beside r51 and r52 on the control board with a bit of wire, paper clip etc.
Disconnect the lvds cable (the one with the blue tab also in the picture.
Power on the tv.
You will get test patterns, does the fault occur?Comment
-
Re: LG 60PZ550 Plasma keeps turning off
it will be a few weeks until I can perform this, but I'll post back my results when I get them. Software reset (again) via menu and it has been working 2 days no problem until just a few minutes ago (where it turned off and on for no apparent reasons)Comment
-
Re: LG 60PZ550 Plasma keeps turning off
Ok, So TV finally died fully (will making troubleshooting easier).. Actually the Panel still seems to light up, but no image or sound. Tried the R51-52 Jumper trick with the LVDS cable unplugged.. It does display a set of test patterns on the panel, so this is good. Now I'm guessing its either the Input board (the big board all the way on the right with all the external plugs), or the power to the input board..
What is my next step here..
Thanks!
foxkmAttached FilesLast edited by foxkm; 11-13-2015, 10:37 AM.Comment
-
-
Re: LG 60PZ550 Plasma keeps turning off
You have a faulty main AV board.
(The one you plug your hdmi cables etc into)Comment
-
Re: LG 60PZ550 Plasma keeps turning off
Heat up the main processor on mainboard and see.if tv comes back onDid I leave the soldering iron on?Comment
-
Re: LG 60PZ550 Plasma keeps turning off
Yes, after letting the TV sit on for a while it actually did come back on (after the set warmed up).. Is it possible the main chip (under the big black heat sink) needs to be reflowed?Comment
-
Re: LG 60PZ550 Plasma keeps turning off
you could give it a try.
If it works; you could see if you can find someone to reball the chip (assuming your not able to do it yourself)Comment
-
Product: Samsung Plasma TV (PN51F5300)
Initial symptoms:
In-laws were downstairs watching tv when they heard a pop and the screen went out.
When resetting power and turning on again, front light blinks red a few seconds and goes out: tv is otherwise unresponsive until power is cycled again.
Initial investigation: Remove back from Plasma TV, armed with DMM.
No obvious capacitor bulging on any visible boards.
Power connected, turned on: green LED on main board repeats a pattern of short-long (1 second total) on, one second off. Repeats five times.... -
Set was manufactured in 2012. I'm trying to diagnose where the problem is. I am assuming it is over-currenting after heating up? Display looks fine until it decides to shutdown. If I keep turning it on, it will eventually refuse to power up and requires unplugging to get it to respond again.
I originally thought there would be some easily detected bad electrolytic capacitors, but I don't see the telltale signs. There might be some very minimal bulging on one of the x buffer board. BN96-22092A (LJ92-01852A).
If I unplug the power feed to the X/Y board (LJ92-01854B), the... -
HP 450 g1 keeps turning on even tho I shutdown/sleep . one way to stop the turning on cycle is pressing the power button few seconds thus force powering it off. But then sometimes it does not turn on at all but next day I try again to turn it on and it turns on....
-
Hello
A device with specifications
Toshiba Satellite PRO A50-A is here to replace the hard drive.
The hard drive has been replaced and there is no problem, but there is another problem, but the customer does not care to fix the problem.
The device enters Windows without any problem and works, even I put pressure on the CPU and graphics, but when I turn off the system through Windows, if I want to turn it on again, the system switches, but it turns off quickly within a second, and this routine continues. It is turning on and off within a second and soon it turns off.... -
Hello,
I am having Samsung PS51E550 Plasma TV. While the TV was working, a crackling sound heard & video went off with audio still ON. After switching it off & ON, the red LED on TV blinks six times & then off.
Opened TV cover & observed foll
a) Green LED on the small PCB blinks at @5-6sec ON & off for 3-4 secs. Red LED on logic board ON
b)Vs & Va on power supply board raises momentarily to 209v & 58v resp & then drops.
c) Cold test on Y-main board shows all 3 pins of FGPF4536 IGBT short to Grnd.
How to confirm Y -Buffer board...
Comment