need part for ymain for samsung pn42a450p1dzxa

[TechOp]

Hey gang,
After a week burnin had this TV come back with no picture but sound. I headed straight to the Y main board and voltage on the buffer was only 29v. Started checking the board visually and found what looks like a blown zener Diode. Wondering if any one has a schematic or knows the part number on that diode for a cross refer?
ymain p/n: Lj41-05075a
ZD5003

[tom66]

Re: need part for ymain for samsung pn42a450p1dzxa

Looks ok to me. Zeners usually fail short or open. If that part has died in that location, it is likely Q5004 nearby has failed causing fault.
I'd look at bad Y-buffer causing this, does Vsc/Vsch come back if Y-buffer out?
Also check if control board is shutting down due to fault detect (will cause Vsc/Vsch to drop out) - can be due to X or Y-main fault...

[TechOp]

Re: need part for ymain for samsung pn42a450p1dzxa

Looks ok??? interesting....... I will check after my parts run to storage.