Question about Sanyo DP42746 42 in. Plasma Television
After 1 year and 9 months, when we turn the TV on (with the power button or remote), the light comes on the bottom left corner, but no picture or sound. No lightning hit the TV or anything, my wife said the TV had some strange colors on it for a minute and then went black.
Sanyo won't do anything for me, I'd like to try to fix it myself, but need to learn where to start.
I just tryed to only replace the Y-Main board and for about 5 mins the TV stayed on but a bunch of static on screen, then CLICK....it died again. Must be the Main and Y-Buffer boards.
Posted on Nov 11, 2008
Kevin, I have the exact same symptoms. I replaced the Y-Main on a hunch. I was incorrect, the TV started up for 30 seconds and then shorted out the board. You will probably need the Logic board and the Y-Main. Let me know if this fixes the problem or if someone has gotten their TV repaired at a shop.
Posted on Feb 13, 2008
Most probable cause is a bad power supply, or at least that where to start. Lay unit flat on a blanket or carpet, being careful not to twist the display. Remove the back panel, probably 15-20 screws, and measure output voltages on the PSU. There should be silk screen ID's to help. - If any are missing or off, then replace the PSU.
Posted on Dec 14, 2007
I had the same problem and my tv was out of warranty. I took it to a local repair shop and they told me didn't work on that brand. They said they charge $300 minimum for labor, plus parts. So probably at least $500 to fix. Since I figured we had nothing to lose my buddy and I took it to our shop at work and decided to take it apart and look for any obvious problems such as blown fuses, burned components, etc. All of the printed circuit boards are connected to what appears to be similar to a motherboard via data ribbons. We disconnected the data ribbon of each PCB to the microprocessor PCB and turned on the TV. Each time it turned back off after about 3 seconds. When we disconnected the Y-Main PCB the TV stayed on and I got the sound back, but no picture. We then disconnected the buffer PCB's from the Y-Main to ensure they were not the problem. Finally, we pulled the fuse on the Y-Main PCB and reconnected the data ribbon and the TV and sound stayed on again. I found a site that sells the Y-Main for $179 and I am deciding whether to try it or not. Any suggestions or comments would be helpful.
Posted on Jan 25, 2008
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