Question about Toshiba 26HF84 26" TV

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Menus but no Input

TV fell off the table onto its face! Now the menus display properly and seem to work, but they are on a black background -- none of the inputs generate a picture. No sound either. I haven't found any loose parts or wires inside. Any idea how I could isolate the problem?

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  • Brian Rowbotham Sep 08, 2007

    I have been over all 4 boards three times with a magnifier. No sign of any damage.

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Have you checked what Tekwiz suggested? And if so, found anything? I'd suggest looking at where each of the input jacks meets the board they are mounted on. I assume there were cables connected to these, and that they received a good tug when the TV fell. If that is the case, it's possible the connection between the jacks themselves and the board they are on was cracked or severed. If they look good, check the rest of that board carefully. Since you're obviously getting no input from any port, and since, assuming there were cables plugged in, that board probably underwent the most stress, I would say it's likely the culprit.

Posted on Sep 06, 2007

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A careful visual inspection is the way to start. Examine the circuit board(s) carefully for cracks. This may require removal of the board & a magnifying glass. Inspect the connectors where wires enter the board, & pay careful attention to the areas around heavy components. Any cracks found must be soldered where they cross the copper traces on the board. The green coating (solder mask) must be scraped off prior to soldering. Most likely the damage is confined to board cracks, as most solid state components are pretty rugged & not subject to impact damage. Use extreme caution around the high voltage area, as the set may retain high voltage even when off & unplugged. The high voltage area is that around the thick wire that goes to the suction cup on the picture tube itself. If you are not comfortable doing on-board repairs, call a qualified technician to do the repairs.

Posted on Jul 20, 2007

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