KDL-46HX800 - Bad Power Supply or Bad Driver Board?
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KDL-46HX800 - Bad Main Board or Bad LED Driver Board?
Metin:
Hi all,
I have a Sony LED TV KDL-46HX800, It does not have backlight at all, when I try to turn it on, the it shows the green light for 3 seconds and then the red light blinks 4 times.
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These are my new findings, I managed to bridge standby and power on and tested all voltages on the power board, all voltages are OK except the ones that goes to the LED Driver, so no (LED_ON, VLED_VCC, GL_ERROR, 12V, GND) all the pins in that connector does not have voltages at all. But the connectors to mainboard and t-con have all voltages.
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These are my new findings, I managed to bridge standby and power on and the led on pins a and tested all voltages on the power board, all voltages are OK even the ones that goes to the LED Driver, so no (LED_ON, VLED_VCC, GL_ERROR, 12V, GND) . I can see 3.3v, 12v and 24v. so power supply seems OK.
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So I am thinking that this could be a power supply issue so I am planning to buy a new power supply board, but now I am thinking could be a LED driver board issue that is also dead and is the cause of the power supply issue.
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So I am thinking that this could be a main board or could be a LED driver board
II could not get backlights but if I disconnect the cable that goes from the led driver board to the t-con board, the tv turns on (no backlight and video) but I get sound, so looks like the main board is fine.
This is the diagram of my TV and all my notes are in yellow:
https://ibb.co/J3dQ7Dp
Could you please tell me if what I think it is correct ?
KDL-46HX800 - Bad Power Supply or Bad Driver Board?
Metin:
Hi all,
I have a Sony LED TV KDL-46HX800, It does not have backlight at all, when I try to turn it on, the it shows the green light for 3 seconds and then the red light blinks 4 times.
These are my new findings, I managed to bridge standby and power on and tested all voltages on the power board, all voltages are OK except the ones that goes to the LED Driver, so no (LED_ON, VLED_VCC, GL_ERROR, 12V, GND) all the pins in that connector does not have voltages at all. But the connectors to mainboard and t-con have all voltages.
So I am thinking that this could be a power supply issue so I am planning to buy a new power supply board, but now I am thinking could be a LED driver board issue that is also dead and is the cause of the power supply issue.
II could not get backlights but if I disconnect the cable that goes from the led driver board to the t-con board, the tv turns on (no backlight and video) but I get sound, so looks like the main board is fine.
This is the diagram of my TV and all my notes are in yellow:
https://ibb.co/J3dQ7Dp
Could you please tell me if what I think it is correct ?
Thank you very much.