classic samsung I think but I can't find a bad cap.red led power light is on.When power button is pushed it blinks twice 5 times then goes back to solid red,then repeats.thx for the time.
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Re: samsung UN40F6300AF won't power up
With this model the power supply should work without the mainboard.
Unplug the power supply from the mainboard, does the TVs back light come on? -
Re: samsung UN40F6300AF won't power up
back light did not come on.Comment
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Re: samsung UN40F6300AF won't power up
Hello, I have same symptoms as OP
TV BRAND & NAME Samsung
Model No. UN40F6300AF
Model Code UN40F6300AFXZA
Version No. TU02
Manufactured Nov 2013
Power supply readings
Unit blinks 2 times when power switch is pressed. No backlight
pin#-desc-stby-p_on
01-B13V-0-0
02-P_Dim-0-Jumps to 2.1v then drops
03-B13V-0-0
04-ECO-0-0
05-Vamp-0-0
06-BLU-0-0
07-Vamp-0-0
08-GND-0-0
09-GND-0-0
10-GND-0-0
11-B5V-0-p
12-A5V-5.3V-5.3V
13-B5V-0-0
14-PS_ON-0-jumps to 3.3v then dropsComment
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Re: samsung UN40F6300AF won't power up
Do the backlights come on and stay on when the cable between the main board and the power supply board is disconnected?
What are the Voltages on the power supply connector's pins when the connector is not connected to the main board?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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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 all!
I'm trying to troubleshoot a Microsoft Surface Pro (5th gen) model 1796 that won't power on. Motherboard model is M1007506-015. My priority is retrieving data, but the SSD is integrated so it looks like if I can't repair it it'll need to go to a data recovery company. I've done a little basic board repair before, but nothing this advanced until now. So please forgive my ignorance in advance. 😅
I found the boardview for this laptop in the forums here, and am able to open it on my PC with FlexBV.
https://www.badcaps.net/forum/troubl...-hardware-devi... -
Hi all,
TL;DR - this laptop is driving me nuts with the oddball power-related behaviors. Appreciate any insight you can provide!
I'm experiencing a power issue on an Asus Probook P5440UF-XB74. Although I've worked with electronics and computers for decades, this is my first attempt at getting into motherboard-level component troubleshooting. Any help the community can provide is greatly appreciated!
A few weeks ago I was using the laptop (on battery power) for a Zoom meeting. The battery was running very low (long meeting) but I wasn't worried about... -
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...
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