Question about LG 50PX4D 50 in. Plasma Television

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I have an lg j250r 50in which did not turn on.After searching on the panel i found they were 5 transistor which were short so i replace them from another 42in which had a broken screen.I also took the rf panel from the 42in and put it on the 50in..now its switching on but the screen is not full its just occupying an upper corner the rest is dark.Tried to adjust vs voltage port but no change.Vs voltage is 203v and Va voltage is 58v which seem to be normal.What shall i do? The Rf panel m refering to is the panel which host the rf socket ,hdmi av.there is some surface mounted capacitor that are short thus i replace with a 42in one

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SOURCE: LG 42PC3RV module LGEPDP burned hybrid IC

If the buffer drive bds. were replaced along with the ysus and zsus and this problem occured it is definately and defective pdp.

Posted on Feb 15, 2008

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SOURCE: Picture gone on an LG 42pc1dv-ec plasma. Sound OK,

Your Vs voltage is high, check if the heatsinks on the Z-sustain board are getting hot after a short time, if so replace the Z-sustain board. If not, dis-connect the Vs & Va plug connection to the Y-sustain & check if the voltages are normal (185V & 80V). If they are then your fault will be in the Y-sustain board. There is a possibility the control board (sits below the power supply) could also be a problem as it is not able to initiate the control to the sustain boards.

Posted on Oct 11, 2009

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