Question about Toshiba 57H81 57" Rear Projection Television

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Picture Jumps/flashes for first 5 minutes

I have a Toshiba 36HF72 that when turned on for about the first 5 minutes has a horizontal flashing/jumping/jittering that "tiles" or scrambles the picture. After it warms up the picture has slight vertical (up & down not side to side) wavy lines throughout the picture but mainly noticable at the top. The picture continues to flash every once in awhile (especially when the vcr is playing). The horizontal & verticle deflection sections have been resoldered as well as the power supply section. Freeze spray has no effect on the board after warm up. Tapping, shaking, or flexing the board has no effect nor does probing with a plastic stick. The problem seems to be gradually getting worse. Any suggestions would be greatly appreciated, Thanks :-) Jumping, wavy picture on DVD or VCR, HD DVR works great when set to 1080i only.

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  • huntermark May 15, 2008

    Same problem on my Toshiba 57HX81 purchased six years ago.

    After five minutes of warm-up (after initial power-up) it goes away.

    The jitter is side-to-side and mainly at the top of the screen.

    -Mark Hunter



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  • 87 Answers

There is a module called a hyper board that is vertically mounted near the jack panel. Inside the module are 10mf/25v capacitors they are grtting weak. The module is fully shielded and pluggs into a socket. the module has 4 tabs (2 on each end) that must be unsoldered before it can be unplugged. This repair should be done by a qualified technician. The caps are surface mounts and very small. Unless you have excellent soldering skills and a rock steady hand DO NOT ATTEMPT to repair this problem on your own.

Posted on Nov 25, 2007


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