When first powered on it has the gray screen and some vertical lines and some blotches. Backlight comes on and stays on so no issue with the inverters or backlights. After 20-30 minutes of being on, the picture comes in perfect and no further problems. Seems like something is having to warm up or maybe a solder joint expanding until it makes contact. Power supply and mainboard pix attached. Power supply voltages seem to be normal though I don't have a SM for this TV. Pins 1&2 on the PS small connector read 2.87V and 2.92V. On the larger PS connector pin 1 is 2.77V and 2,3,4 are 12V and 9, 10, 11 are all 5V.
I am getting voltages from the the 1117 LDO's and the two transistors or voltage regulators and will post those shortly. I haven't tested extensively yet but it seem when I poke around some of those components that the screen comes to life sooner. More on that later. The caps on the power supply are rubicon, on the mainboard they are several different generic and/or cheap no name brands. Maybe some ripple current??
More to come but meanwhile if there are any suggestions on what else I should check for or test please let me know.
Thanks.
DK
I am getting voltages from the the 1117 LDO's and the two transistors or voltage regulators and will post those shortly. I haven't tested extensively yet but it seem when I poke around some of those components that the screen comes to life sooner. More on that later. The caps on the power supply are rubicon, on the mainboard they are several different generic and/or cheap no name brands. Maybe some ripple current??
More to come but meanwhile if there are any suggestions on what else I should check for or test please let me know.
Thanks.
DK
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