The 42RV530U is known to develop problems in both the power board and the main board. You can check out our power board repair service athttp://www.coppelltvrepair.com/p/442/repair-service-for-toshiba-42rv530u-power-board-75010942-dead-tv-or-clicking-on-and-off-problem and I'd also recommend that you search for 42RV530U at http://blog.coppelltvrepair.com as we will eventually release an article on how to test the board. Hope this helps.
For more details type in this site name "Electro-help" (DO NOT copy and paste the site name from here. Doing so may lead you to wrong place) to search box of your search engine [not in the address bar of your browser], and press "Enter".
It is an electronic equipments service help site.
Note the position of hyphen in between words in site name. The site will appear as it is in web; subtitled as Service help to electronic home entertainment equipments.
Pull up older posts.
You can locate this site, either at the bottom part of first search page, or at the top of second.
Detailed descriptions are there to help you.
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