Question about Akai PT4298HD Rear Projection Television

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Top half of screen

The top half of the screen the pictures have a blue shadow . the bottom half is perfect.?????????????

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Re: top half of screen

Blue STK392-040 Convergence IC bad = replace both with
first quality parts = NO generics,they don't hold up. I USE
PANASONIC with great success................T.

Posted on Dec 14, 2007

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1 Answer

After a half hour of operation, the picture begins to shadow.

These sets have several common problems listed below.

Problem #1) Convergence


  • Screen Looks Distorted/3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking screen
  • White looking sceen
  • Halos around objects
  • Red/Orange looking

You can see some examples and find a fix here...


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You need to replace both convergence ICs they are both STK392-110 you can get replacement ICs at the following link with free instalation Instructions with pictures. Here is the link.

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your having convergence circuit problems, you`ll need to change the convergence IC`s and any burnt resistors in the convergence circuit, if you have questions e-mail me back, good luck, BMW Rider

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