Question about Akai PT4298HD Rear Projection Television

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Picture shaped like hour glass

For some reason my tv picture is shaped like an hour glass i cant for the life of me figure out why it worked perfectly fine a few hours ago and i turned it on now and i get this http://www.flickr.com/photo_zoom.gne?id=700222415&size=o there arn't any options in the menu to change image demensions what is possibly wrong?

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  • Trevor Pearson Jul 03, 2007

    I have no idea what an horizontal ouput transister is nor now how to look for ESR leaks, it did reset it self last night but now its back to the same thing

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  • 41 Answers

You have a PIN CUSHION problem, is usually a bad capacitor or open resistor in the above cicuit. Check all the caps around the horizontal output transister for ESR leakage.

Posted on Jul 03, 2007

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1 Answer

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Likely convergence failure. Hard repair. Needs TV shop to repair. Picture will be partially hour-glass shaped and the will be multi-colored picture parts.

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Picture looks like hour glass.


You're probably talking about bad convergence. Probably Convergence power board. Only $20-$30 from encompassparts. com, if still available.

Apr 17, 2010 | Televison & Video

1 Answer

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A temporary solution is to unplug the TV for a few minutes, remove static from the glass with your hand. It is important to unplug rather than turn off. If you have a degauss button you can also press that before unplugging. Wait several minutes or an hour. Then plug it back in. If you have Picture in Picture it may be an issue with that and to permanently solve may need a repair person. The unplugging may get you by for a few days at a time. That's at least better than an hour.

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1 Answer

Hourglass Shape


If there is a hour glass shape to the image but convergence is normal, there are 2 possibilities. You either have a pincushion correction problem or if the hour glass seems to be moving, it will be an open filter capacitor in the power supply.

Unless you are electronically inclined troubleshooting this issue will require a factory trained service technician. You can expect to spend $300-$400 to fix this.

Feb 17, 2009 | Philips 60PP9202 60" Rear Projection...

1 Answer

Hour Glass Picture


can you put it other way i did not understand what you want to say & que is not complete.

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picture is starting to curve in from the sides like the shape of an hour glass. Is the tube shot? NO. is it something less costly? YES YOUR PROBLEM is in pincushion correction circuit.call skilled tech to fix it. it will not take much time. good luck.

Sep 22, 2007 | Televison & Video

1 Answer

Tv picture shaped like hour glass


Big cap in the regulation ckt is bad. Depending on model could be various values, a shop could use their ESR meter to find and replace it.

Jul 03, 2007 | GE 31GT740 31" TV

1 Answer

Tv picture shaped like hour glass


The link you posted has been deleted, so I cannot see the picture you posted. If the sides bow in like an hourglass and the red, green and blue colors are still aligned then there is a horizontal width or pincussion problem, but if the sides bow in and the 3 colors have separated and are no longer anywhere near aligned then you have a convergence problem, both of which should be serviced by someone with experience in servicing projection TV's.

Jul 03, 2007 | Akai PT4298HD Rear Projection Television

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