I have a black screen and sound but no picture. hisense 32k20dw

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Hisense Television

Repair documentation and service information for Hisense televisions.

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Dom Fakelastname @domfran

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게시일: 2018년 11월 25일

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I have a black screen and sound but no picture. hisense 32k20dw

hisense 32k20dw is the model of my tv. yesterday i turned it on it blinked 6 times and i got no picture. from what i read online its more than likely a blown capacitor. i also noticed theres a hissing noise coming from the power supplys pcb board i feel like thats the problem because i checked and i dont see anything fried on the other board but im still a newbie when it comes to things like this so id greatly appreciate some help. the board of intrest im looking at is a RSAG7.820.5338/ROH. i cant isolate the hissing noise it sounds almost like its in between the main board and the power supply. also the hissing noise is greater when the tv is off.

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Hi I have a Hisense LEDN40T28P when I switch it on it displays for 5 seconds then dim but the sound is playing and you can see picture but is dim

Isaac Ngomane 의 2022년 7월 9일

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oldturkey03 @oldturkey03

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게시일: 2018년 11월 25일

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@domfran the caps on your boards look good. Of course the only way to test them would be with a capacitance meter etc. but this could be a backlight issue. Shine a flashlight beam (in a darkened room, TV on and a channel that has sound) at an angle against the display. See if you can make out any silhouettes etc. If so it is your backlight that is not working. That could be related to a bad power board or a bad LED backlight strip. Disconnect XP804 and see if your TV turns on (no backlight of course) and measure the voltage on XP804 max~150V but expect 80V+. After that check the voltage across the pins on C717. Measure the voltage on the fuse on your T-con board as well. Expect 12V on that. Let us know what you find

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Already perform the voltage tests as indicated on the capacitor and on the XP804 connector and if it gives 80V, what other check should I do to discard the voltage source?

Edgar Alejandro gonzalez 의 2019년 9월 27일

@Edgar Alejandro gonzalez same make and model same issue?

oldturkey03 의 2019년 9월 28일

@oldturkey03 Yes, it is the same brand and model.

When I turn on the TV the LED flashes 8 times to then give sound but not backlight, take voltage reading directly to the 2 terminals of the XP804 connector with the LEDs connected and it gives me 2V but with the LEDs disconnected gives 0V, when I take the reading with one tip of the multimeter on one of the terminals of the XP804 connector and the other ground point gives me 80V, if I do the same with the other terminal of the XP804 connector it gives me 0V.

Edgar Alejandro gonzalez 의 2019년 9월 28일

My Hisense tv has sound no pic and can't figure out TY

karen veenstra 의 2019년 10월 28일

@karen veenstra what is the exact model? What have you checked?

oldturkey03 의 2019년 10월 28일

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Hi I have a Hisense LEDN40T28P when I switch it on it displays for 5 seconds then dim but the sound is playing and you can see picture but is dim — Isaac Ngomane
Already perform the voltage tests as indicated on the capacitor and on the XP804 connector and if it gives 80V, what other check should I do to discard the voltage source? — Edgar Alejandro gonzalez
@oldturkey03 Yes, it is the same brand and model.

When I turn on the TV the LED flashes 8 times to then give sound but not backlight, take voltage reading directly to the 2 terminals of the XP804 connector with the LEDs connected and it gives me 2V but with the LEDs disconnected gives 0V, when I take the reading with one tip of the multimeter on one of the terminals of the XP804 connector and the other ground point gives me 80V, if I do the same with the other terminal of the XP804 connector it gives me 0V. — Edgar Alejandro gonzalez
@karen veenstra what is the exact model? What have you checked? — oldturkey03

twofast2trackpro @fasttrackpro 평판: 109 fast track productions 2 · Answer 1 · 2018-11-25T13:54:19-07:00

twofast2trackpro @fasttrackpro

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게시일: 2018년 11월 25일

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hello Dom Fakelastname, my name is John. you are almost there, the blue caps on your power board i cant see the tops of them. but if they are push out or split open then that is your issue. or you can replace the board folloing these steps below.

best steps to follow,

1: lay t.v. screen down on a soft surface like your bed.

2: remove the screws from the back edge and input connectors as well as the stand.

note: back should lift off every easy if you have a struggle there is another screw to be removed.

3: take pictures of the power board it would be the board that the plug goes into.

note: leave wires in power board until replacement board comes.

4: google search your make and model T.V. of a replacement power board. reference images with the ones you took.

5: it will be 4 to 5 screws to remove power board and squeeze connectors for the wires.

6: after replacing board lift t.v., plug in, test, and put back together.

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see thats my problem i dont see any expanded caps or black circuit points all i got to go off of is the hissing noise

Dom Fakelastname 의 2018년 11월 25일

could the "hissing" noise be fans? If it were a capacitor, you would see it and I don't see it in any pictures.

bill 의 2022년 7월 9일

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Angela Dee @angeladee 평판: 1 · Answer 2 · 2019-03-12T18:42:19-07:00

Angela Dee @angeladee

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게시일: 2019년 3월 12일

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I have the same tv and my screen just went black without warning and won’t come back on. The sound still works and I can change channels, just no picture. I do not have a hissing noise with mine. I am unable to pull up the settings, input, or guide because I can’t see anything.

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Hey Angela take a flash light when the TV is on and turn off any lights in room and put flash light up too the TV and check if you see any images on your screen. If so your driver for the back lights are out and need to check voltage to see if driver board is bad or back lights are bad.

twofast2trackpro 의 2020년 8월 11일

Hi there,

I have the same problem.

How can you help.

Thx

Iventure 4real 의 2021년 9월 14일

PLEASE, the very first thing to verify with sound, no picture is your backlight. If you have done that check, state it so we don't have to chase our tails asking the question.

bill 의 2022년 7월 9일

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Hisense Television

I have a black screen and sound but no picture. hisense 32k20dw

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