I have a plasma TV model # 50PA6500-UA that when the customer plugs it in, the screen flashes on and off and you can hear a relay on the power supply board continuously clicks on and off. I replaced the relay but the problem persisted. After further testing, I noticed that when the main board is disconnected from the power supply board the problem doesn't occur. Any tests or advice that could lead me to a conclusive board that I should replace would be very much appreciated.
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Re: Power board relay going insane!
This is the relay we replacedAttached Files -
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Re: Power board relay going insane!
here's a couple more pictures.Attached FilesComment
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Re: Power board relay going insane!
the relay is doing whats its told . now you have to find why its behaving so . does the relay click once with main board removed ?Comment
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Re: Power board relay going insane!
Unplug the tv. Unplug the ldvs ribbon from the mainboard to the control board and put a piece of wire in the holes marked auto ext on the control board. Plug the tv back in and check if you have test patterns on the screen.Attached FilesComment
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Re: Power board relay going insane!
a long shot replace the blue cap in the middle next to the large transformerComment
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Re: Power board relay going insane!
We did the above test and got nothing. It wasn't until we unplugged the main board from the power supply with the rest of the test parameters that the test patterns started. Is it possible that the main board it telling the power supply to turn on and off repeatedly?Comment
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Re: Power board relay going insane!
If the tv stays on and goes through the test patterns the mainboard is bad (BGA chip).Comment
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Re: Power board relay going insane!
Do post #6. They had a lot of bad blue caps at that location. fixed a few PA series with that problem back in 2015...
See https://www.badcaps.net/forum/showth...t=38197&page=3Last edited by jjanssen7; 11-03-2020, 08:52 PM.Comment
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi, this is my personal laptop, which the original board (lets call it Board A) blew up PU8700 (TPS51486), making a hole on the board, i had left the laptop at my desk one day with the battery fully charged and didn't touch it for a week, but when i tried to turn it on it didn't
Thought the battery was dead, so i plugged in the charger then tried to power on, the power LED blinked once, charged LED still orange, unplugged the charger, plugged in again and I noticed the "magic smoke" smell, so i unplugged the charger, removed the back cover and saw the blown IC (the "magic... -
I was working on this CNC machine today found no keyboard functioning no control relay powering on
The screen powered on and was giving an operation error but the manual was not very clear about what the error exactly was but with a little bit of troubleshooting and finding out that the control relays not powering on and no keyboard functions we narrowed down to this one switching power supply which of course does not have any indicator LED light they are on the keyboard interface/relay controller board
Found shorted diodes on main controller relays there are 3 of them that... -
Yesterday I successfully repaired a Middle Atlantic UPS2200R-IP that had inadvertently been used as a surge suppressor at our transmitter site. It has already been replaced with an updated one but it's coming home with me now instead of being e-cycled. To be specific, this is the MA model that has the blue backlit display and has been discontinued, although this design may have been used in many UPS units including the smaller Middle Atlantic ones in this series.
Here's what happened: We experienced a brownout/surge at the site, which damaged the UPS and took our broadcasting... -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"...
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