Question about HP PL4260N 42 in. Plasma HDTV

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Shut down problem

Here is the situation . It is an HP Model PL4260N 42" Plasma The plasma screen is an LG PDP42X13995.CSLGBNA (I was surprised at that) Power supply pcb is Sankin PKG1 PSC10165B M Red LED goes to combo red and blue. Then shutdown to red I got the problem partly figured out. It seems that the VS supply 185vdc is causing the shut down. All other voltages are right on spec. It seems that the driver board (Not sure if that is what it is called) may be causing the problem. This is the pcb on the left side with 8 ribbon cables going to the plasma screen. When I pull the fuse for the 185vdc on the driver board, power will stay on. LED goes to blue. When fuse is back in, it will shutdown after a few second delay, I noticed that the voltage would just start to ramp up, then it immediately shuts down. So either there is a load that is to much or something else on the driver pcb. I hope this helps. Let me know what you think.

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Contact us to join our group which is taking action. We all have had this same issue with this TV. HP sold them with a KNOWN problem. dorje@forexcafe.org

Posted on Jul 11, 2009

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