Question about Sylvania 6620LG 20 in. EDTV-Ready LCD Television

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Shut down while watching (no sound or picture)

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.
Regards, Steve

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

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Posted on Jan 02, 2017

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  • 2336 Answers

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

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ginko
  • 19396 Answers

SOURCE: No power up

You need a reay, RJP3053


Buy from RELAY STD DPDT for $ 2.79


Posted on Dec 23, 2008

dsacco86
  • 1077 Answers

SOURCE: New TV 9 mos old, Won't stay on after power up? Remote or manual turn on, set keeps turning off after 1-2 second green on and brief screen flash.

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

dsacco86
  • 1077 Answers

SOURCE: SYLVANIA 42 INCH 6842PEM DOES NOT TURN ON

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

  • 8457 Answers

SOURCE: this tv shuts down and goes into protect when

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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