Model number 40rv525r Toshiba
TV wouldn't turn on so layed it down flat an was checking the power board an took fuse out an put back in an the TV came back on so I put it back together an stood it up an now tv not turning on again
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Re: Trouble with Toshiba flat screen
Over time with heating and cooling of the power board the fuse holder loses tension and won't make proper contact with the fuse, remove the fuse and bend the contacts together and see if it works, if it still gives trouble replace the power supply or solder the fuse to the holder if you have a soldering iron and can do the repairs.
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Is the power led on? Is the panel back light on? Tap gently on the screen. if you see whitish on the screen when you do this the panel is on. Press menu button does the menu appear?
if the set is 5 yrs old or older many times capacitors on the power board go bad. They are recognizable by a slight domeing on the top instead of being flat. these are replaceable at component level.
you can check on ebay under the model number for a board. The board is held on with screws and plug in connectors.
Did it just start doing this? I don't think the issue is of one related to age. Do you have it placed next to a floor register or some such product that produces heat? Look on the backside of the tv where the vent bars are, and see if they are coated in dust. Have you called the manufacturer to ask about it? Sometime by asking at work or talking to friends you can find the answer, or get one of those :light bulb moments over your head.
Main board fault. Contact any service technician or the authorized service center for Toshiba. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Pull up older posts. Surf the site with patience. Do a search by type in the brand name of your device at its search box and press "Enter". http://electronicshelponline.blogspot.com/
Service mode entry, adjust and exit procedure to many popular brand TVs are given. Never forget to exit the service mode, after all adjustments have been done.