Re: 17PW20 PSU Working but no power lights on LCD
I need an esr meter really, I'm thinking about making one tho
I need an esr meter really, I'm thinking about making one tho
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Re: 17PW20 PSU Working but no power lights on LCD
same as but saving up for one of rusmikes ones he does a very good price shipped to the uk.Comment
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Re: 17PW20 PSU Working but no power lights on LCD
37" up and running Saturday, just swopped main board and its working a treat
thanks guys for the input
gods knows how meny ive fixed now...thanks to this forumComment
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Re: 17PW20 PSU Working but no power lights on LCD
BAD NEWS the goodmans has returned with similar fault, although ive found that its something to do with the 3v yellow cable that goes to the back light, any ideas what to check or replace on this circuit? ive noticed that when the tv is brought out of standby there is no 3v to the back light all other voltages are stable, but when there is the 3v's the tv works ok but then switches off after about half an hour, it sounds like a bad cap but ive replaced all the main capsAttached FilesComment
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Re: 17PW20 PSU Working but no power lights on LCD
The Vestel main board will do a self-test when first plugged in, if this fails it will go into "lock out" mode where it won't do anything. So, check the 24V peaks to 24V briefly. Honestly, these power supplies are so much trouble. I just replace them with a refurb 17PW15-8 or similar, those seem to last.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 17PW20 PSU Working but no power lights on LCD
i have noticed on some repair kits there is a voltage reg 5v, and C901 cap i havent replaced them, so for the sake of a couple of quid im gonna get the C901 cap first which is 4.7uf @ 50v then see if that does it, cant see voltage reg being faulty if im getting 5v stable,
24v comes on, then when the set powers back to standby when the 3v isnt present it shuts down the voltages so all the other voltages are fine.
only caps that will be left to replace will be the little ones, 100uf 16v etc, im determined to try and fix this one because ive replaced so many parts im sure it will last a long time, but saying that theres only so much on one tv you can take.....lolComment
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Re: 17PW20 PSU Working but no power lights on LCD
See the tiny red caps near the big transformer. These tend to fail o/c.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 17PW20 PSU Working but no power lights on LCD
ive changed them already, so they should be okComment
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Re: 17PW20 PSU Working but no power lights on LCD
Yeah, they could have failed again. Just check them on a cap meter.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: 17PW20 PSU Working but no power lights on LCD
If they are reading a higher capacitance they could be leaky and this could be a sign of failure.
I'd estimate ~85-90% of these Vestel PSU failures are due to them.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Hi and thanks in advance for any input you might provide!
I have a Sceptre U550CV-UMRD8POTV83BB 4K LED (this is a dumb tv) that I bought new in August 2021, so It's just completed 3 years.
Main power board model: TP.MS3683.PC821 T-Con board: N4TP546UHDPU2L_BO
Last Sunday I was watching a dvd and fell asleep for about half hour, when I awoke the tv screen was black and couldn't get the dvd menu to show, so I changed the input to antenna and had sound but no picture, turned it off. I then got online and found this great site! ....read many troubleshooting tips and this... -
Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
Hi everyone,
Im looking for some advice regarding my Samsung UE55MU8000 TV with main board model BN94-11606C. The TV suddenly stopped turning on and now shows no signs of life at all not even the standby light at the bottom.
Initially, I suspected an issue with the PSU, so I took it to a repair center. They tested it and confirmed that the PSU works perfectly, even on other TVs. Based on that, I started investigating the main board.
I disconnected the main board from the PSU, and the backlight turned on, which seems to confirm the main board is the issue.... -
Hoping someone here could possibly help. I have a few questions in regards to compatibility with main boards. But I'll give a quick short run down on what's going on first;
I have Samsung Smart TV UA65MU6100WXXY version DA01
Now years ago it started intermittently playing up after a lighting strike. Lighting hit the block of units i was living in at the time. Ever since that night the TV started having a mind of its own, It would randomly turn itself off or on, and all inputs stopped responding like HDMI, aerial, but USB still worked. Anyway, over the next few months... -
Hey guys great forum glad to have found it. I bought a Sony XBR 65X900C cheaply because it didn't work. No signs of life at all not even a light/led. All I hear is a brief high voltage sound when I throw the power to it.
Didn't see any obvious signs of damage so right away started checking voltages. This is what I see:
Power Board Connector that goes to Main board
CN6401
Pin 01 NC
Pin 02 NC
Pin 03 "BL_ON": 0V
Pin 04 "N/C"
Pin 05 "STBY 3.3V": 3.5V
Pin 06 "GND": N/C
Pin 07 "AC_OFF"...
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