Question about Sylvania 6620LG 20 in. EDTV-Ready LCD Television
TV shut down while watching, first heard faint "click" (ie: relay probably dropping out) and set went out completely. Manual on-off does nothing. Later when plugged unit in again heard "click" then 2-3 seconds later it clicked again. Concluded that a relay activated on power-up then dropped out.
Am a EE so took back off set: fuse OK along with all diodes and power resistor. suspect problem is in one of the low voltage power supplies as there is only 3 vdc at (12vdc) relay coil. I could order repair manual but may not be worth effort as most surface mount devices are not "home replaceable".
TV cost just under $300 and cost to have repaired may not be worth it.
Your advice requested.
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Posted on Jan 02, 2017
SOURCE: flat panel tv blows fuses
If the same fuse blows again as soon as you plug it the LCD to the AC outlet, It means that a transistor(s), capacitor(s) or diode(s) are shorted.
I can repair the power supply for you. Let me know if you need further assistance.
Posted on Nov 10, 2008
I would try leaving the TV unplugged for 30mins so the TV can reset itself.
If that doesn't work, your TV should still be under warranty. I know 95% of come with a 1 year warranty.
The most common problem with Sylvania TVs made by FUNAI, the Backlight Inverter board fails to early in life. ( That's the part that powers the screen)
The Tv can't power up the screen and it turns off automatically. Basically called "Protection Mode" so it protects the other parts inside the TV.
Posted on Jun 01, 2009
The most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.
I hope I shed some light on the subject for you.
Posted on Jun 28, 2009
power board ic converter it dead.
Need new power board can get in the web.and replace it or hire tv. repair man part labor $575
Posted on Aug 12, 2009
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