Sceptre X505BV-FMDR

[BadGoo]

I have a Sceptre X50 TV that has no picture, but audio. It just went off instantly. There was no slow dimming or buzzing etc. Upon further investigation, I can see the picture using a flashlight on the screen. My question is, can I replace the power supply board to fix this or could it be the backlight inverter or both?

Thanks for the help!

[tom66]

Re: Sceptre X505BV-FMDR

It could be either. Can you supply photos of the boards in the TV? https://www.badcaps.net/forum/showthread.php?t=39740

[nomoresonys]

Re: Sceptre X505BV-FMDR

if all your voltages are correct on ps it's probably the inverter board.

[BadGoo]

Re: Sceptre X505BV-FMDR

Sorry for the extreme delay. The friend who I'm doing this for put it on hold and forgot about it. Here's where I'm at now. I still need to test voltages but here are the photos. Visually everything looks OK unless I'm missing something. Indicator lights, sound and picture is working (minus the backlights)

[budm]

Re: Sceptre X505BV-FMDR

Please upload the pictures of the whole back side of the TV so we can see how all the boards are connected together.

[nomoresonys]

Re: Sceptre X505BV-FMDR

if all your voltages are correct on ps it's probably the inverter board.

disregard, jumped too soon, needs testing, may need to see if main is sending bl-on signal.

[selldoor]

Re: Sceptre X505BV-FMDR

My question is, can I replace the power supply board to fix this or could it be the backlight inverter or both[

if all your voltages are correct on ps it's probably the inverter board.

LED lit tv so No inverter board, possibly a Led driver board

[nomoresonys]

Re: Sceptre X505BV-FMDR

LED lit tv so No inverter board, possibly a Led driver board

right, couldnt tell because op did not put type of tv in title.

[willyam1]

Re: Sceptre X505BV-FMDR

same problem in pilot 50''smart the power supply is AY160D-4HF01.
ALL VOLTAGE OK 12V 24V 5V 5VSTBY EXEPT NO VOLLTAGE TO THE LED BACKLIGHT BLON IS 4,65V OK
in the back of the p.s ther an ic BD9211F that drive the leds section. pin 1 vcc=11.8v pin 2 stby on /off 4.65v ther no pulses in the output pin 18+17 could be the bad ic?

[willyam1]

Re: Sceptre X505BV-FMDR

did you manage to fix your tv?

[willyam1]

Re: Sceptre X505BV-FMDR

anyone?

[nomoresonys]

Re: Sceptre X505BV-FMDR

another one of those NO FOLLOW UPS.

[willyam1]

Re: Sceptre X505BV-FMDR

sorry was sick but what do you mean by NO FOLLOW UPS.

[nomoresonys]

Re: Sceptre X505BV-FMDR

it pertains to posters who never post back about their results, a lot of people fix their tv and never reply back, so other folks are just left hanging as to what the outcome was, which doesnt help anyone else with similar problem, who may have been following thread, as it appears badgoo has done here, no biggie, it just doesnt help any.

[willyam1]

Re: Sceptre X505BV-FMDR

You are right but its not me i hope that i can fix mine and i will post the result thanks willyam

[marcoclo]

Re: Sceptre X505BV-FMDR

I'm having the same issue ordered a new power supply that controls led light voltage with no result. My leds don't power on the TV still has sound with no backlight display I will be taking a better look this week to determine if maybe a led is shorted causing the backlight not to turn on.

[nomoresonys]

Re: Sceptre X505BV-FMDR

I'm having the same issue ordered a new power supply that controls led light voltage with no result. My leds don't power on the TV still has sound with no backlight display I will be taking a better look this week to determine if maybe a led is shorted causing the backlight not to turn on.

looks like your on the right path, been reading many many posts about led light strings messing up one way or another. makes me want to stick with plasama or lcd for personal use.

[willyam1]

Re: Sceptre X505BV-FMDR

after replacing the ic that control the valltage to the led strings can see that the valltage is starting to rise and then falling slowlly but still no backlight i plugged out one of the 3 pluggs and put an externall led string and then tv works ther was a backlight. i shorted the plug tv works but ther a dark spot in the backlight
the valltge is neggativ -234v
willyam

[BadGoo]

Re: Sceptre X505BV-FMDR

I apologize for the no follow up. The person's TV I was attempting to fix gave up and he just notified me that he will be giving me the TV all together for me to attempt to repair and keep. I'll post photos of the boards connected within a day or two.

[BadGoo]

Re: Sceptre X505BV-FMDR

And he delivered quicker than I thought! Ok. Here's the wiring.

EDIT: All voltages coming off the supply are correct.