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Old 12-08-2017, 04:24 AM   #11
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Davi.p's Avatar
Join Date: Sep 2009
City & State: Milan
My Country: Italy
Line Voltage: 230Vac 50Hz
I'm a: Hobbyist Tech
Posts: 1,462
Default Re: Sony XBR75X850C no picture backlights on

Wow.. a giant 75 inches for free, you lucky! But you must pay body building lessons to handle it...

Unfortunately i dont understand all your text due to my english, maybe are you using some slang? The only thing i can understand and suggest you is to get a switching psu and supply externally to the panel with tcon unhooked a 15-16v to the AVDD lines or if you don't have such a psu try at least with a common 12v and see what happens, is the fastest way to show for a short, if the PSU goes in to protection then you have a short on that line, rather.. if the psu is not shortcirc. protected is even better so you see which part is broken by touching what gets very hot or start to smoke. I have good news for you, tcon smps can go short also only at full charge, so there's a remote possibility your tcon is faulty and even the replacement one..(but difficult i think).

Last edited by Davi.p; 12-08-2017 at 04:28 AM..
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