Hey guys how you doing. So I replace the 2 IPM. modules on the y sustain board, this one had the symptoms of vertical lines flashing screen and Mal discharge. I heard a ticking coming from the SUS IPM module. As I've been tinkering with these boards in the past I automatically assumed it was bad so I replaced it had the same effect. Then I replace ER IPM. Have the same effect. So I realized afterwards that I have bad must set on the upper and lower sustain boards. I gathered enough to replace the MOSFETs on the upper board and now I have a clear picture but I still have a presumable flashing picture and when it flashes I get a little bit of a male discharged image a little bit of blue and pink dots. But I can make out the image all on screen menus and everything do the same I would like to know I'm only using the upper board as the lower board I had to order because it soon as I took off the MOSFETs that were shorted the board was still ohming 132 ohms between the two copper pads. Before I realized that I had shorted MOSFETs on upper and lower sustain boards I noticed v scan was jumping all over the place. Now I have a stable vscan with just the upper board installed. But yet I still have this flashing image.
I would like to note that when I first turn the TV on I have a perfect blank gray raster before the data gets sent to the sustain board to generate an image from the logic board.
This grey image that stays there for 2 seconds before I get the actual picture is not flashing. Also along with the flashing flickering image I can hear the sustain IPM making some odd noises like along with the flickering image. The noise it is making is not a ticking sound but more of a choppy buzz kind of like the buzz that is sustained module usually makes but interrupted. All other voltages on the board appear to be fine and there are no shorted transistors or diodes along the board. Is it possible that I could have got another faulty module? Of course I would be answering my own question on that one. I'm just curious as to if I have overlooked something. I should note that one of the 10 ohm resistor in location r79 look like it had a chunk taken out of it. I replaced it and I still have the same problem. If I remove the upper buffer board I can hear the v scan power supply on the sustain board making odd noises. I have a video that goes along with this symptom but it's really hard to make out what it's doing since my phone camera is too slow to pick up the response from the screen. Any other ideas?
I would like to note that when I first turn the TV on I have a perfect blank gray raster before the data gets sent to the sustain board to generate an image from the logic board.
This grey image that stays there for 2 seconds before I get the actual picture is not flashing. Also along with the flashing flickering image I can hear the sustain IPM making some odd noises like along with the flickering image. The noise it is making is not a ticking sound but more of a choppy buzz kind of like the buzz that is sustained module usually makes but interrupted. All other voltages on the board appear to be fine and there are no shorted transistors or diodes along the board. Is it possible that I could have got another faulty module? Of course I would be answering my own question on that one. I'm just curious as to if I have overlooked something. I should note that one of the 10 ohm resistor in location r79 look like it had a chunk taken out of it. I replaced it and I still have the same problem. If I remove the upper buffer board I can hear the v scan power supply on the sustain board making odd noises. I have a video that goes along with this symptom but it's really hard to make out what it's doing since my phone camera is too slow to pick up the response from the screen. Any other ideas?
Comment