Question about Toshiba 57H81 57" Rear Projection Television
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.
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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Posted on Jan 02, 2017
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Bounce horizontally usually means up and down,which relates
to the vertical output IC. Solder IC301, IC401 pin connects==try
again.You can easily isolate "bounce" problems by lightly
tapping on the vertical IC heatsink....Let me know if you need
PS. Though hard to find, a qualified tech could do that repair
in home for 300. to 400.00...
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