Sylvania LC420SS8 LCD TV - Page 3 - Answered Questions & Fixed issues

u need to change the pcb boards on rear of tv inside ... u need someone to do this. antistatic band needs to be worn when changing.

It will need part/s for sure.
Please try :
First, look at the screen in darkened room to see if you can see any slight glow from the screen, if it does, then the problem can be the T-CON (not getting the 12vdc) or the main logic board not feeding the signals to the T-CON board. if not, next place to check will be the power supply module, make sure it has 24vdc which is required by the backlight inverter to work, the reason for not having 24vdc can be from bad DC filter caps (leaking/bulging top, high ESR) or short circuits in the inverter board which will cause the 24vdc supply to go into shutdown mode, so you may have to disconnect the power cable that feed the inverter board to see if the 24vdc will work without the inverter board hookup, you will need to apply about 3~4 amp of load to the 24vdc to make sure it can handle that. There are fuses on the backlight inverter boards also. So there is some troubleshooting you will have to do to find out the causes of the problem you are having. If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on: 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: 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. Please post back what you find. Please leave rating if it helps.

iiiiiiiiiis it fixed yet?

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My name is Bruce

Check the tv manual control buttons right side of the tv bazel frame tv facing u,see if u can used the buttons like power, chanels - + or volumes - + from it.If u can, mean the tv have problems with is remote control.Change new batteries for the remote,still no response from the remote.Mean the remote is dead.Try website like Remotes.com to buy an exact remote or very close it.

The LCD dispay panel is bIf it is still under warranty the mfc will pay for the repair. If not replace the tv.The panel is will approach or exceed the cost of a new set.

The power supply may have gone out, you need to check the main AC fuse in the power supply module and also check the caps.

The tv Tuner signal board is the causes and the problems.Tries websites like Shopjimmy.com Ebay.com to buy a refurbish tv Tuner sisgnal board for the replacement.

The tv power supply board is the causes and the problems.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

Hi,
Which brand universal remote you use?
Thank You

Yes, it can be the power supply due to bad caps, but it can also be due to shorted circuits in the backlight inverter board that caused the TV to go into shutdow. You need to do some troubleshooting to narrow down the problem before buying the wrong parts.

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://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting Failed TV and Monitors: 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. Please post back what you find.

The power supply may have gone out, you need to check the main AC fuse in the power supply module and also check the caps.
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://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting 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 PANASONIC FM/FC series Low ESR, 105c, High ripple current and long life rating made for switching power supply from Digikey.com Parts: www.shopjimmy.com

Please post back what you find.

Power board or main board.

Pick one, buy, replace and see what happens.

At $72 delivered to you I think the power board is the easier choice:
http://cgi.ebay.com/Sylvania-LC420SS8-Power-supply-/250730878858?pt=LH_DefaultDomain_0&hash=item3a60b9978a

I am not anyhow associated with the seller, that was just what eBay gave me.

Of course if you're handy with a DMM you shouldn't need that...but this is the fastest and relatively cheap, considering you can always re-sell the board, way to check.

Hope this helps...if it does, don't forget to rate it :-)

Bobby @ www.coppelltvrepair.com

Hi,

This is most likely the Power Supply. It depends on your serial number: Power Supply For Serial Number Over J37713001 Manufacturer Part Number 1ESA20888-PW Description Power Board Substitute Part n/a Estimated Weight Unknown History Parts Ledger • Core Return Ledger Availability by Warehouse Atlanta, Ga 11 Las Vegas, NV 8 Lawrenceville, GA (Dist) 6 Baltimore, MD 7 Miami, FL 29 Total Availability 50+ Estimated Ship Date In Stock Retail Price 69.72 Core Price 150.00 Power Supply For Serial Number Under J37713000 Manufacturer Part Number 1ESA14710-PW Description Power Board Substitute Part n/a Estimated Weight Unknown History Parts Ledger • Core Return Ledger Availability by Warehouse Atlanta, Ga 5 Las Vegas, NV 2 Lawrenceville, GA (Dist) In Stock Baltimore, MD In Stock Miami, FL 17 Total Availability 50+ Estimated Ship Date In Stock Retail Price 91.87 Core Price 150.00 the parts are available from EncompassParts.com The power supply is simple to change, You should double check the power outlet to be sure.


Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

I need a remote for this TV!!! They didn't have it when I purchased it at Target. Where can I get it??

Hi,
This symptom appears when power supply board got problem in tv. It seems power supply board is defective in tv that is why it is not turning On or it wont show power in indicator.
If you are handy with electronics stuff and have prior experience then unplug tv from wall socket, take off back of tv by removing screws at top-bottom and sides and check main fuse located on power supply board, replace it if found blown, replug tv and check.
If fuse blow again then replace power supply board as power part number written on it.
Hope these info will help you.
Let me know if you have additional question.
Thanks.

Can you use the buttons on the TV? If you can then it can be the remote IR receiver module inside. Check to see if it has remote sensor input jack on the back, if it does, it can be dirty contact in side the jack, you can clen it by plug and unplug the jack with the small headphone plug a couple of time to clean the switch contacts. If it does not have one you can try new remote IR receiver module. You can also check to see if the module is getting the 5v feeding it.
Check www.shopjimmy.com

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 Failed TV and Monitors: http://s807.photobucket.com/home/budm/allalbums http://en.wikipedia.org/wiki/Capacitor_plague

Look at ur tv remote,find the button said CC on the remote,push it to close CC1,2,3 to off.The captioning,will stop.

The humming is caused by the power source, a part (most likely a capacitor) has failed and acts as a short overstressing the source. If your electronics skills aren't good enough for you to open the tv, locate the failing capacitor and replace it, then call a repair guy ASAP, longer you wait bigger the damage becomes.

That is most likely a power supply problem. Check/replace the fuse as needed and try replacing the diodes that form a full bridge rectifier.