It looks like it dead when i plug it in no pic no sound no red light on the power button. i checked the outlet, it has power, i checked the power cord on another TV and it worked. I replaced the 3 boards in the TV, the power board, main board, and T con. still no lights anywhere. Any ideas on what it could be?
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Re: SAMSUNG UN50EH5000 dead no power
Unplug the cable from the Power Bd to the Main Bd. Plug in TV to AC. Do the backlights come on? -
Re: SAMSUNG UN50EH5000 dead no power
no, they did not.Comment
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Re: SAMSUNG UN50EH5000 dead no power
Psu faulty then, also make sure you have DC V across the fioter caps. Throwing boards at it is pointless and a waste of money you need to diagnose it.Please Do Not PM My Page Asking For Help Badcaps Is The Place For Advise, Page Linked For Business Reasons Only. Anyone Doing So Will Be Banned Instantly !
https://www.facebook.com/Telford-Tel...7894576335359/Comment
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Re: SAMSUNG UN50EH5000 dead no power
Need good clear sraight on pictures of back of tv with cover off and each board.
Need voltages from connector that goes from power supply board to main board. Will need pin#-pin label-Pin voltage in standby-Pin voltage when pushing power button and picture of connector on power supply board.
Format:
Pin# - Pin Label - Pin Voltage standby - Pin voltage power on
1 - XXXXXXX - XXv - XXXv
2 - XXXXXXX - XXXv - XXXv
3 - XXXXXXX - XXXv - XXXv
4 - etc.I assume no responsibility for any stupid suggestions I might post.Comment
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Never stop learning
Basic LCD TV and Monitor troubleshooting guides.
http://www.badcaps.net/forum/showthr...956#post305956
Voltage Regulator (LDO) testing:
http://www.badcaps.net/forum/showthr...999#post300999
Inverter testing using old CFL:
http://www.badcaps.net/forum/showthr...er+testing+cfl
Tear down pictures : Hit the ">" Show Albums and stories" on the left side
http://s807.photobucket.com/user/budm/library/
TV Factory reset codes listing:
http://www.badcaps.net/forum/showthread.php?t=24809Comment
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Re: SAMSUNG UN50EH5000 dead no power
Could be PSU issue or Backlights issue....I would think it is the latter...However, it could be a combination of both........We do need the information dskall asked for to make a proper determination.Last edited by Andrew F. Ali; 03-25-2017, 08:41 AM.Comment
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Re: SAMSUNG UN50EH5000 dead no power
main supply fuse might be blown on both power boards . check with your meter with power removed .Comment
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Hi, have this Samsung QE 75 Q 7 FGMTZG TV with no function. First analysis shows the power supply board is dead and fuse blown. Power Supply has the number BN94-11439A. I did short circuit test transistor and diodes and those do not appear to have shorts. I must admit I did not look at every single data sheet.
In the TV was some black dust residue, so probably one of the electrolytic caps blew, but they do not show short either.
Does anyone have schematics for that board ?
Any good tip, what could be the issue ?
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Hi
Picked up another TV. Samsung UN43NU6950FXZA. No power and no standBy led on. Removed back cover and:
Main fuse = OK
Back light LED = OK. Power them with aux power source
LED output = OK 156V
I do get 12 V DC out of the power supply going to the digital section but no 5V or 3.3V. PS_on voltage is only 1.8V. I have looked everywhere on the PCB , I could not find i reference for 5V output.
Also removed connections to panel, speakers and remote but no luck. One strange thing is that even with the LED power supply working, backlight LED do not turn on...07-20-2025, 08:06 PM -
Samsung UE75MU7009TXZG Endless Power Cycle
Hi everyone and thanks in advance for any help I might get here
My Samsung TV is about 4 years old. The exact model number is UE75MU7009TXZG.
About half a year ago I started seeing occasional green frames pop up while watching movies. I mean literally green frames. Not the image turning green, but the entire screen turning green for a split second. This happened maybe once or twice during a 2 hour movie. So no big deal, but clearly something was not quite right.
Since a few days, the TV won't turn... -
Hello!
i got a damaged Manson NTP-5561 (60V, 1,6A DC output) and and the main issue is that the controler IC for the LCD display has a short. The controler IC PIC18F87K90 is mounted on the back of the back of the LCD. Vss-Vdd = 3 Ohm. The 5V and 3,3V power line was killed as well, but that is not a problem. A new LDO 3,3V and 5V 7805 is already ordered.
Replacing the PIC18F87K90 is necessary but that makes no sense without having the HEX dump of the new controler.
Does anybody have such a power supply and could do a HEX dump of the Flash and EEPROM memory?
...04-12-2025, 10:38 AM -
Hi. First time post. I've scoured the previous forums looking for info - there isn't much for my model
UN65MU8000FXZA
We had a power outage. Everything plugged into the Monster surge protector seems to be fine except my Samsung TV. It was dead when the power came back to the house.
Here's what I've looked at:
Unplugged main board from power supply - BACKLIGHTS COME ON.
Ordered new main board - still didn't work. Not sure if used MB was DOA
MAIN BOARD = BN94-12295K
PSB= BN44-00912 L65E8NR_MHS
There...
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