Vizio M3D651SV will not power on.
I acquired this 65” LED 3D TV from a friend. That the claimed that while watching tv it just went out. There was nothing being displayed on screen and no sound. No light coming from the TV what so ever. There was no pop when it went out at least not loud enough to be heard. They did claim that the tv did something similar earlier in the day but it did turn back on. It was a couple hours later that I finally went out and has not been able to be turned back on by press the power button on the TV or remote.
I've taken the back covers off and checked with my multimeter that I am getting 5vsb at the power board pins and the 5vsb makes its way to the pins at the main board even to the connections at the power button on the TV and the remote IR senor in the tv I believe that is what is called. There are actually 4 5vsb pins. When I press the power button or remote button I can measure the volts in each of their pins and can tell it is it is trying to push the 5vdc through. It doesn't appear that the main board processor is sending the turn on signal to the power board. The PSON Pin commonly referred to on many other posts on this power board I am assuming is the one titled Remote_ON/Off. There is also 1 BL_ON/OFF pin and 1 DIM_PWM_Signal pin along with 3 12vcd pins, and 5 SGND Pins.
I watched a youtube from Jimmyshop on how to test a power board. There was a part that mentioned using a jumper from the PSON Pin (assuming it is the Remote_ON/Off titled pin on this power board) to a 5vsb pin. When I do this it does then generate the 24vcd from the power board to the led drivers connections and the 18vcd from the power board to the main board which powers the speakers. I have the TV plugged into a surge protector as soon as I flip the power switch at the surge protector I can hear a poof sound from the speakers. I unplugged the speaker connections to clearly hear for other sounds and I do hear a faint I guess you could call it a click. It sounded like maybe a relay switch on the power board.
I would assume that based on my limited tv and electrical knowledge that I would blame this tv's issue on the main board because the power board appears to generate the vdc to power the necessary components of this TV.
In the same youtube video about checking your power board there it was also mentioned checking to see if the backlights would turn on. I am confused on this part. I can't seem to figure out how to force the backlight on. I thought that I could do another jumper from the 5vsb to the BL_On/Off pin and or another jumper from another 5vsb pin to the DIM_PWM_Signal but when I try to this nothing happens as far as lights coming on, I do appear to get the 5vcd on the BL_On/Off but only 2.5vcd on the DIM_PWM_Signal at the led driver pin. I am just using a straight wire to do the jumping from the connection unplugged at the main board. I already get the 24vcd from the power board to the led drivers. What might I be doing wrong trying to get the backlights to turn on?
Is it possible that I may have both a bad main board and led driver board at the same time? Is it necessary for the main board to work correctly to even be able to attempt to test the backlights?
As far as checking the T-Con board the pins are so tiny to measure the vcd. Is it necessary for me to get these vcd readings to figure out these issues?
Regarding power board testing Buds trouble shooting guidelines mentions testing the power board output with a dummy load. This part has me worried to attempt as the pins are really tiny and close together. Do I even need to attempt this? Would the main board not send a signal to the Remote_On/Off switch because of a load issue? I'd figure the tv screen would at least flicker a brief light and then shut off.
Like I previously mentioned my tv and electrical knowledge is limited. I watch a lot of youtube videos and read many forums but none really addressed this model. I hope I got the jargon down correctly. I am stumped on what to do to figure out how to get this tv working again. There are no obvious bad capacitors or burn marks. Do I need to provide board numbers and what pictures should I provide?
I hope the badcaps.net community can help.
I tried to provide as many details as possible. If you need any additional details please let me know.
I acquired this 65” LED 3D TV from a friend. That the claimed that while watching tv it just went out. There was nothing being displayed on screen and no sound. No light coming from the TV what so ever. There was no pop when it went out at least not loud enough to be heard. They did claim that the tv did something similar earlier in the day but it did turn back on. It was a couple hours later that I finally went out and has not been able to be turned back on by press the power button on the TV or remote.
I've taken the back covers off and checked with my multimeter that I am getting 5vsb at the power board pins and the 5vsb makes its way to the pins at the main board even to the connections at the power button on the TV and the remote IR senor in the tv I believe that is what is called. There are actually 4 5vsb pins. When I press the power button or remote button I can measure the volts in each of their pins and can tell it is it is trying to push the 5vdc through. It doesn't appear that the main board processor is sending the turn on signal to the power board. The PSON Pin commonly referred to on many other posts on this power board I am assuming is the one titled Remote_ON/Off. There is also 1 BL_ON/OFF pin and 1 DIM_PWM_Signal pin along with 3 12vcd pins, and 5 SGND Pins.
I watched a youtube from Jimmyshop on how to test a power board. There was a part that mentioned using a jumper from the PSON Pin (assuming it is the Remote_ON/Off titled pin on this power board) to a 5vsb pin. When I do this it does then generate the 24vcd from the power board to the led drivers connections and the 18vcd from the power board to the main board which powers the speakers. I have the TV plugged into a surge protector as soon as I flip the power switch at the surge protector I can hear a poof sound from the speakers. I unplugged the speaker connections to clearly hear for other sounds and I do hear a faint I guess you could call it a click. It sounded like maybe a relay switch on the power board.
I would assume that based on my limited tv and electrical knowledge that I would blame this tv's issue on the main board because the power board appears to generate the vdc to power the necessary components of this TV.
In the same youtube video about checking your power board there it was also mentioned checking to see if the backlights would turn on. I am confused on this part. I can't seem to figure out how to force the backlight on. I thought that I could do another jumper from the 5vsb to the BL_On/Off pin and or another jumper from another 5vsb pin to the DIM_PWM_Signal but when I try to this nothing happens as far as lights coming on, I do appear to get the 5vcd on the BL_On/Off but only 2.5vcd on the DIM_PWM_Signal at the led driver pin. I am just using a straight wire to do the jumping from the connection unplugged at the main board. I already get the 24vcd from the power board to the led drivers. What might I be doing wrong trying to get the backlights to turn on?
Is it possible that I may have both a bad main board and led driver board at the same time? Is it necessary for the main board to work correctly to even be able to attempt to test the backlights?
As far as checking the T-Con board the pins are so tiny to measure the vcd. Is it necessary for me to get these vcd readings to figure out these issues?
Regarding power board testing Buds trouble shooting guidelines mentions testing the power board output with a dummy load. This part has me worried to attempt as the pins are really tiny and close together. Do I even need to attempt this? Would the main board not send a signal to the Remote_On/Off switch because of a load issue? I'd figure the tv screen would at least flicker a brief light and then shut off.
Like I previously mentioned my tv and electrical knowledge is limited. I watch a lot of youtube videos and read many forums but none really addressed this model. I hope I got the jargon down correctly. I am stumped on what to do to figure out how to get this tv working again. There are no obvious bad capacitors or burn marks. Do I need to provide board numbers and what pictures should I provide?
I hope the badcaps.net community can help.
I tried to provide as many details as possible. If you need any additional details please let me know.
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