I have a Samsung PN60E550D1FXZA with sound and no picture. When plugged in i briefly get correct Vs and Va which then drops down to 0. With only X-main hooked up, it drops slowly. With both X and Y hooked up it drops significantly faster (they are in series). I have checked both Y buffers and found no shorts. I read in another thread here that freezing U5014 and the caps around it can cause it to turn on temporarily and let you confirm the fault but I haven't had any success with that (using an upside down air can, i'm going to pick up proper freeze spray this weekend).
I am just curious if the almost immediate dropping of Vs and Va when Y-main is connected is a confirmation of a fault/short in the Y-main or just a by-product of being hooked up to the buffers and screen?
Is there any other way to isolate whether the X-main or Y-main is indeed the culprit?
Thanks!
I am just curious if the almost immediate dropping of Vs and Va when Y-main is connected is a confirmation of a fault/short in the Y-main or just a by-product of being hooked up to the buffers and screen?
Is there any other way to isolate whether the X-main or Y-main is indeed the culprit?
Thanks!
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