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Hey, I just got a used sony kv-27xbr55. The picture looked great when I got it., but I began to notice an odd wavy pattern on the screen, especially when the set has been on for a while. The pattern is typically one or two parabola-shaped wavy things that open to the left and stretch to the right. It does not affect the picture shape itself, but just spreads over it. It appears with the tuner and other inputs, such as DVD. Any ideas what this is, and whether it can be eliminated with an adjustment, or if it needs to go back to the shop for serious work? I like the set a lot otherwise.
Thanks
RobIt could also be a ground loop. Try unplugging all internal feeds such as cable tv and/or satellite tv and just play a dvd and see if the problem is gone.
Sam
I had a similar problem with a Panasonic.... it was a faulty power supply...BTW, when i replaced teh power supply, the picture was WAY better than when the problem was not there.... the power supply is critical on TVs....Lot's O volts going to to the tube!
SamM
Sam,How did you go about replacing the power supply? Was it a DIY job or did you take it to a professional to get it done? The reason I ask is that I have the same problem as Syracuse posted...have a Sony too. I thought it was the cheap a$# power cord at first and was going to rebuild that. Anyway...thanks to any response/tips you can give on that power supply transplant.
Rob
the TV was under an extended warranty... and, after about 5 visits from their 'professional' repairers, they finally figured out that the power supply was not putting out the voltage it needed... It was not until they actually saw what you are seing that they believed i had a problem... the problem started by a sudden widening and then shrinking of the picture sporadically... only 1 tech saw it on one visit.... finally the power supply had reached th point when i got the picture doing what your tv is doing.....It does not look very complicated, i would have attempted it myself, but the unit was covered!
I would try to hunt doen the powersupply from Sony...
Sam
Okay, thanks for the info Sam.Rob
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