My samsung LNT4071f/XAAA picture disappear after half hour of use. It still have sound. I have to wait for least half an hour to turn on to get pics back on. I was wonder if it could be the TCon board.
If you get just grey glowing screen (look at it in darkened room), then it can be the T-CON is not getting the 12v from logic board or the logic board is not sending the 4 pairs of the the LVDS (Low-Voltage differential Signal) to the T-CON board, you will need the scope to look at the LVDS. You can try coolin ght T-CON board with freeze spray used for electronics troubleshooting to see if the pictures will come back.
If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:
Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://s807.photobucket.com/home/budm/allalbums
http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Please post back what you find.
You need to find out if you are getting 24vdc at the inverter board first.
Please read: Please see my basic troubleshooting guide here:
http://www.fixya.com/support/r5093881-lc...
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I have check the screen in the dark when I put a flashlight on the screen I could see pictures. I have try a new T-con board and Inverter board without any success. Could it be the main board or logic board or power supply board or the panel.
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