Question about Televison & Video
The 5vdc standby is workingbut the 12 and 24vdc power supply are noty running, it can be due to not getting the turn on command from the main board, or the fault is in the power supply itself, or it sensing shorted circuits in the backlights inverter board so it will not come on.
So look for PSON signal (3.3~5vdc = ON), or disconnec the cable to the backlights inverter board to see if the 12/24vdc will come back on.
You did not provide the model number so I cannot look up the power supply information.
Please read my guide again;
Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
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.
Please post back what you find.
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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