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 there arn't any options in the menu to change image demensions what is possibly wrong?

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Re: Picture shaped like hour glass

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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Part of the picture is off screen

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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After the tv has been on for about 30 minutes the picture starts flickering really bad and eventually will go completely white like where it looks kind of like negatives? it works perfect for that first...

The colors wheel could dies at any time of the tv life,at any monent without any period of times.The colors wheel run at RPM spinning revolution are 1000 RPM a min. to make colors for this tv.The problems u discribing are one problem of the effect of the colors wheel is dying and worn out.The colors flashes like film negative,the picture flashes Black&White withtin the picture.Replace the colors wheel again,will solved this problems.

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2 Answers

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 | Projection Televisions

1 Answer

Sony kp-61s70 hour glass shape on picture bows in

the sony service menu can be entered by pressing "display" "5" "vol+" also the diagnostic screen can be reached by vol- instead of + when you are in the service menu the number buttons navigate it its a little tricky at first but as long as you dont hit enter before you exit if you mess up it wont save just make sure if you fix it you save it by pressing enter

Jul 13, 2009 | Sony KP-61S70 61" Rear Projection...

1 Answer

Picture is curved like an hour glass

that a pincushion problem likely caused by a failed capacitor

Mar 26, 2009 | RCA Projection Televisions

2 Answers

Stretched screen

Try the menu under setup, find convergence, it realigns the colors,, you are suposed 2 do that periodicly,, or when u move the tv,, should help you ,, ive got that same tv,,

Oct 05, 2008 | RCA P61940 61" Rear Projection Television

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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

1 Answer

Hourglass shaped red

I need to see a picture of the TV set. send a photo to

Jun 05, 2007 | Akai PT4298HD Rear Projection Television

2 Answers

Zenith 46" with a "hour-glass" picture.

If the hour glass figure is a seperation of colors that appear to be convegence mis aligned, then, the convergence ICs would be the problem. If the picture is clear and you have a bending on the sides then the pincusion circuit in the horizontal circuit is where to look. Be careful of this circuit, it does control the high voltage. The only way to have a board checked is to have an Authorized Service Center look at it. It does, however, sound like there is a cold solder joint in the power supply that has gradually opened up and now is permanantly open. Call Zenith (LG) to see who they recommend.

Mar 25, 2007 | Zenith Z46Z83D 46" Rear Projection...

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