ITS JUNK GET RID OF IT!!!!!!!!!!!!!1
Testimonial: "That’s what I thought. Does the panel have any value? Should I just trash it at the landfill facility?"
That’s what I thought. Does the panel have any value? Should I just trash it at the landfill facility?
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SOURCE: Backlight on input being pulled down to 2.4v thus
If you can feed 3.3v to BL_ON line (but you have to disconnect the line from the main board first) and the backlights doe come on then you inverter is OK. What you can do is not connecting the BL_ON line to the inverter board, and feed the 3.3v to it so the backlights will come on and see if you get the pictures OK, I have a feeling you have bad main board that is not sending 3.3v to the inverter board and more likely you will not see the pciture on the screen either. I have seen this symptom before and it is the main board problem.
What is the make a nd model of the TV? You can look here for SCH. WWW.ELEKTROTANYA.COM
Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
SOURCE: no picture and power light blinks 7 times on my viera tc-p50st30 plasma tv when it is turned on
That can be caused by either the SC or SD board. Contact the people at www.tvrepairworld.com they can assist with proper diagnosis and they also should have the replacement board
SOURCE: Samsung TV goes Black but keeps sound
you will need to check weather the 24vdc supply for the inverter board is good no drop voltage. if no supply check the power supply board. then you should check if their is a inv_on signal at the power inverter board around 3v-4.4vdc . if goes out during power on tried to disconnect the supply going to the inverter board to ensure if their is a shorted parts in the inverter board. if the inverter_on signal also goes out even with out inverter board connected that was mean you have problem in the processor board.
Im having similar problem and with my limited knowledge of lcd tvs and the voltages ALL being good except the pwr on or sw on voltage from the main board to the power supply which tells it to switch everything on Im guessing that something is going wrong on the main board. In the condition where it freezes it (the power on V) which switches everything on i get varied voltages such as 2.5 or 3 or (the normal 5v) and then when nothing powers up (blank screen) i read 0v on pwr on voltage but all my other voltages are corect (24v to inverter, 12 v to main board, 5v, etc.) Im guessing from researching this is that there is in improper voltage somewhere in the main board circuit. I have been unable to find it so i may order another board and post back.
SOURCE: Panasonic viera wont turn on after power surge
My panasonic 42 inch does this if the power goes out or tv is unplugged prior to powering the tv off first. I unplug the power from the wall wait 2-4 days max then when I plug it back in the tv comes right back on with no problems. Don't know why I have to wait so long to plug it back in
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