I have an LG 50PZ550 with EBT61533103 EAX63546403 Main Board. The TV would turn on but with absolutely no display, no LG logo nothing. I did the control board screen test and all was working so I determined the main board was causing the problem. I did the oven reflow trick and now alls working great, I know this is just a temporary fix. I have lost HDMI's on other TV's but they would still have the LG startup screen and logo, this on had absolutely no display at all. Anyone know what component on the board may need resoldering ?
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Re: LG 50PZ550 with EBT61533103 EAX63546403 Main Board
this is going to be the main processor on the main board. it is the big bga chip.
hopefully your oven reflow will give it some more life. not normally cost effective to replace it and replacement boards are scarce.WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS? -
Re: LG 50PZ550 with EBT61533103 EAX63546403 Main Board
since it is a bga chip (solder pads and balls under the chip), you can reflow with hot air and lots of flux but recommended that a proper ir rework station be used. this way it is heated to an exact temperature while using a preset heating graph, so not to under/over heat the chip, thereby creating further faults.
your oven reflow is basically a poor mans way of doing a temporary repair. issue with baking is that even if you are great at masking off everything that you possibly can, you are also still heating more sensitive parts of the board, so it can cause other problems potentially.
if it is working now, i would run it as is till the problem arises again. hopefully it will be a fair while into the future.WHY CAN'T PHILIPS USE PHILLIPS HEAD SCREWS?Comment
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Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
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"... -
ONN 100012588
Issue: No Power, Then Rebooting After Main Board Change
Short answer: replace main board and power board
Technical answer: replace main board and Q306 & Q307 on power board.
Long answer:
TV wouldn't turn on. Power switch was fine which means the main board isn't processing the power on signal. Replaced main board. TV turns on now but randomly reboots. Bad main board? EEPROM? Tried to pull main board and got a shock touching the corner of the board. That's weird. C334 (450V 10uf) capacitor is still holding a high charge.... -
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 suppose the real question is whether the existing pinouts from ether a 17IPS71 psu are cross compatible with a 17IPS12 psu? If they are then the exchange of the main boards should have no issues providing the screen is compatible with both main boards. Obviously you can change the screen configurations easily enough (providing you have the correct files) for the main board. Why may you ask would I do this? Well a lot of the smart features are no longer working on a Hitachi 48HBT62U main board I wish to give it a new lease of life!
Obviously the same LVDS connector for the screen connection...
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