SOURCE: LTV-27w7 blackscreen
Have you tried unplugging overnight? Sometimes mine gets screen garbage and that clears it up. Of course, now it says "Auto Scan Required" every time I power up. Maybe I should've grabbed that after Xmas 32" at Fry's for $400.
SOURCE: Maxent 42" Plasma TV takes 3 - 5 minutes to sync after turning on
I had the same issue....thankfully, I had purchased an extended warranty from Best Buy...I had been in a panic, because I NEVER thought I would pay a grand for a tv, but I LOVE it...anyway.....I had the "Geek Squad" come to look at the tv....the tech took 30 secs....there is a problem with your Y-SUS (Y-sustain board)...it will need to be replaced...and...the tech called another tech, and he advised that the Z-SUS be replaced as well (apparently he had to go back to the same home after a Y-SUS replacement to change out a failed Z-SuS).....retail on Y-SUS is about $300...ebay has them for less than half that, if you think you can do it yourself...keep in mind that "Maxent" is a Zenith/LG product, so finding parts might be a challenge if you base it upon Maxent....hope this helps!!
SOURCE: Tv Turns on then stops after a few minutes
This set uses a lamp and a bad lamp will cause this symptom. You should be able to get the lamp out yourself and get a part # off it.
SOURCE: the video cuts out after 1 minute the tv is turned
The backlight inverter board may be going out, or bad capacitors in the power supply.
http://en.wikipedia.org/wiki/Capacitor_plague
SOURCE: Sanyo Vizon 42" Plasma DP42746 Was
This is a common problem with these TVs. You can download the official
Sanyo repair manual for this TV (DP42746) at http://www.eserviceinfo.com/downloadsm/43343/sanyo_dp42746.html.
I uploaded it here when I had the same issue with my TV last year.
The solution is almost always to replace the Power
Board (Y-Main) and the Upper and Lower Y Buffers. The parts and costs (from Sanyo in
July 2009) are listed below (NOTE: Sanyo will not ship these parts to anyone but
a repair shop):
1. V4 Y-Main (Y-Sustain) Circuit Board (Part #
LJ92-01200A, Alt Part # LJ41-02759A) - USD $139.00
2. Upper Y-Buffer
Circuit Board (Part # LJ92-01202A, Alt Part # LJ41-02760) - USD $64.00
3.
Lower Y-Buffer Circuit Board (Part # LJ92-01203A, Alt Part # LJ41-02761A) - USD
$64.00
Sanyo charges USD $10.50 for shipping, which brings the total cost for
parts to USD $277.50. From my research, a shop would probably charge between
USD $500 and $700 to do this repair.
FYI - there is a class action lawsuit pending against Sanyo for this
issue. The V4 Y-Main (Y-Sustain) Circuit Boards fail VERY frequently in this TV
due to overheating. Hope this helps.
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