Question about Toshiba Televison & Video
Water sprinkled unto the chassis while watering tree behind the Toshiba 51h84c. While watering I hit a leaf with water and it flowed over to the tv. The tree is no longer behind the tv. The tv was on during the time it got wet and was distorted immediately afterward with wavy lines and then after that it went to multicolor lines. Foolish me, I left the tv on for about half an hour when I should have turned it off. The watering was closest to the cable input. Above that is the perforated vent. I removed back cover to view damage, saw nothing, touched nothing (warning signs kept my fingers away), vacuumed the dust, put cover back on. Turned off for 2 weeks, turned back on, still has multicolor lines, lines are very close together, looks like a weaved cloth. Chassis no. TAC 484
There are two convergence our ICs that converge red-green-blue pictures to make one correct colorful picture.
It seems water damaged convergence output ICs that will be replaced. Also confirm +21V and -21V supplies to convergence out chips.
Convergence out chip is big black IC and it would have STK394-250A number written on its surface, installed with aluminum heat sink to maintain its temp. This tv has two ICs. Local tv repairman will help you to get these chips replaced if you have no experience of working in tv circuit boards.
Hope this info will help you.
Let me know if you have additional question.
Posted on May 13, 2010
The warnings signs in the back of the TV should deter you from trying a DIY fix. The water has damaged one of the SUS boards that controls convergence and picture display. This is close to ther power inlet and the vent you speak of. Damage is not always obvious unless you know what to look for ( fattened Capacitors) slight burns under the base of the board.
Just replacing the board wont fix it as it has to be correctly tuned with the other board so they sync. This is done with special tools and by following a circuit diagram and the manufacturers recommendation. Your safest and cheapest option is to take it to a repair centre. Cost is about $300 for parts only. A good tech will have it fixed in around 2 hrs and at worst 3 hours so expect a $600 bill. get it quoted first.
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Posted on May 12, 2010
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Posted on Jan 02, 2017
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