Hi, I have a Sony KDL-32L4000 LCD tv that really hates to turn on. I have to unplug it, wait until it clicks, plug it in, wait for 2 clicks then try to turn it on, and repeat until it turns on (usually takes about 8-10 tries), other than that nuisance it works perfectly, I am new to repairing or diagnosing tvs, and google wasn't helpful. Any help is appreciated, thanks.
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Re: Sony KDL-32L4000 doesn't like to turn on
The recommended practice is to open the TV and take a picture, showing the overall layout of the TV. Given the nature of the problem, a second picture of the power supply would be useful.
Try to get them as close to the maximum resolution of 2000 x 2000 as possible, and attach using 'Manage Attachments' (below the text entry area). Further hints on taking the pictures can be found in my signature.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic. -
Re: Sony KDL-32L4000 doesn't like to turn on
Sorry if their bad quality, all I have is my camera phone.Attached FilesComment
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For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Nope, none are bulging.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Fiddlesticks!!
Well, here is another idea. In the picture, the power supply input is at the left, the output is at the right. It appears those three connectors are labeled.
I suspect the bottom connector is the one I am interested in. It looks like there are about 5 wires, what does the label say about each of the wires?
(If you haven't noticed, a decent camera would make this a LOT easier).
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
It's not labeled, but it seem to get bundled with the connector above it and then goes to the component/hdmi etc. inputs.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Here is the opening lecture on troubleshooting 101.
The basic design of all LCD (and plasma) TVs is the same. The power supply is a dual supply - standby and main. The standby supply is live whenever the TV is plugged in, the main supply is switched on to turn on the TV. The main board has a small section that is powered by the standby supply. It's chief function is to monitor the control panel and the IR sensor. When the Power button is pressed it turns on the main supply, performs some rudimentary tests to verify the main part of the board is getting the proper voltages, and starts the main processor. IF any of the tests fail, it turns off the main supply. From your description, that is what is happening.
Now, the question is - is the main power supply producing the proper voltages, or does the main board have a problem? The symptoms (works after many tries) would indicate a power supply problem, specifically bad capacitors. You indicate there are no signs of bad caps, but I've had situations where the guy with the problem couldn't recognize a bad cap when he saw four of them. That is one of the reasons I ask for pictures. The pictures you provide aren't good enough. The only way to check that the power supply is working is for you to determine if the power supply is producing the proper voltages in the brief time the relay is closed. THAT means you have to identify every wire on the cables going to the main board, and check the voltages on them.
PlainBillLast edited by PlainBill; 06-26-2011, 07:56 AM.For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Ok, is there an easy way to do that, or should I have a professional look it over?Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
With those caps being under the heatsinks then I would lean toward bad capacitors as well. They do not have to be bulging to be bad. I have seen many power supplies like this that have baked caps that are not bulging. It looks to me like there are bulging caps under one of the heatsinks but, just so we are sure, if you have any caps that look like the ones in the attached picture then they are bad and need to replaced.Attached FilesLast edited by rayrod81; 06-26-2011, 08:40 AM.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Sorry PlainBill, didn't notice this the first time, each individual wire is labeled, here they are: PS_ON, PWR_ERR_DET, 4VSB/1.2A, GND, GND (NO WIRE), GND (NO WIRE), 4VSB/1.2A, 4VSB/1.2A (NO WIRE).Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Good. Now do the same for the other two connectors, please.
Also, note rayrod81's comments.
IMHO, it's not worth taking the power supply to a professional. The supplies are available on eBay for about $60, including shipping. A full set of replacement caps would cost less than half that. A professional would simply replace the power supply, charging a markup on the supply and also labor.
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
I re-checked every capacitor, no bulging out top or bottom, the other two connectors are as follows: 1. GND (X5 one without a wire) 24V (X5) 2. GND, GND (NO WIRE), PWR-6V, PWR-6V, GND, GND (NO WIRE), PWR-PANEL, PWR-PANEL, GND, GND (NO WIRE), PWR_15V/1.6A, PWR_15V/1.6A, GND, PWR_30V/2mA.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
I would check if any of these pins rise when the power button is pressed. Use the associated GND pins as an indicator. If there are multiple adjacent pins with the same legend theya re all connected together, so just check one.
24V (X5)
PWR-6V (X2)
PWR-PANEL (X2)
PWR_15V/1.6A (X2)
PWR_30V/2mA.
I would also be interested in any changes on the following pins, especially PWR_ERR_DET
PS_ON
PWR_ERR_DET
4VSB/1.2A
PlainBillFor a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.
Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
Just so Ibget this right, I remove the back cover, plug in the power supply, push the power button, and the pin will physically rise? or will the voltage rise?Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
He means voltage.My pc
CPU : AMD PHENOM II x4 @ 3.5Ghz
MB : ASUS M4A89TD PRO USB3
RAM : Kingston ValueRAM 16gb DDR3
PSU : Cooler Master 850W Silent Pro
GPU : ATI Radeon HD 6850Comment
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Re: Sony KDL-32L4000 doesn't like to turn on
I was wondering if you ever solved this issue because I'm experiencing the same problem?Comment
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I have a 2018 Sony kd 49XF8096 that suddenly stopped turning on: No LED lights up, and it doesn't respond to the power button or the remote control.
The power supply delivers 19.45vand I simply tried to check the fuses on the 2 boards (power and main) but everything seems ok. I have no references on where to test the voltage, but somewhere on the mainboard I also detect some, so you can't to understand which card may be to blame.
Can anyone give me some advice? I haven't found anything online
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