Re: Vizio sv420m black screen
Someone on these forums had a similar issue with a shorted cap on the T-con pulling down 12V.
Someone on these forums had a similar issue with a shorted cap on the T-con pulling down 12V.
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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. -
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Re: Vizio sv420m black screen
I checked resistances, there is no real difference than the others.
What is the usual way that the PS_ON voltage gets conditioned? Is that made from the main 5v? Is it fed from a processor on the mainboard?The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
I dont know where to go from here. The worse thing is I think the problem is with the main board but I'm not sure enough to order one.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
Try powering it up without the T-con connected.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: Vizio sv420m black screen
Is 12V present on the power board without the t-con connected?--- begin sig file ---
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Please do not post inline and offsite as they slow down the loading of pages.
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The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
Any more things to try? It's hard for me to order a board at this point cause I still dont know which one is bad. If you have a clue, let me know which one I should order and why.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
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The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
I was working like crazy so I put this one to the side for a little bit.
I read somewhere that you can jumper the 5V to the PS-ON to get the power board to show the other voltages. Does this sound like a smart move???The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
I never updated my situation on this TV. I purchased a replacement mainboard ($30) and it fixed my problem. I didn't take any readings on the new board, I just popped it in and it worked.
I currently have one more TV on the bench that I am working on and I think that will be the end for me with TV's. These two, 42 Vizio LCD and 32 insignia LCD, are going to be mounted in my basement and 2nd bedroom. This would be four total that I kept from repair work. The other two are 42 Samsung Plasma and a 32 Memorex LCD.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Re: Vizio sv420m black screen
$30 for a mainboard would be nice, where did you get one for that price? I have same model tv but trying to repair the mainboard.Comment
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Re: Vizio sv420m black screen
That was ebay. Sometimes you get lucky and see that someone is selling one cheap. That TV still works. I gave it to my mom.The strong-minded rise to the challenge of their goals,the weak-minded BECOME HATERS
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Hello,
YouTube video of the problem encountered: https://youtube.com/shorts/q7TLNv36LUo
I am a pro and I have a problem that I have never seen despite my 7.5 years of experience on my own and my thousands of repairs, on a customer's Dell G3 15 3500.
On this PC I have already changed the complete palmrest because the keyboard was no longer working properly.
I also changed the screen because the PC fell and the screen was broken.
I changed the battery with a new and original battery.
I also had corrosion/oxidation on the... -
Hello everyone !
My name is Chris, I am a 30 years old embedded software developer working in the automotive industry. I am really passionate about learning new skills and repairing/crafting stuff. I came around this forum last week with the goal of repairing my faulty gaming laptop, indeed, I was video editing on it when suddenly a black screen popped and never disappeared
I bought some stuff to try to repair it and learn as many things as possible about computer repairs but nothing worked so far. When the black screen appeared, my legion 5 pro was connected to my external monitor...
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Hi guys
strange one
I have a dead Sony 55X850D
when plug in, black screen, no front white or red LED, no back light no screen
Voltages I get
3.3v LD/power and main board
reg 12V
reg 19V
3.3v on power on pin
no Tcon on
no tcon 12v
no BL_on
I do get BL_ERR 2.0v
I tried to bypass it by ground it but still get same symptom
I did also found a possible shorted cap on main board as it is showing 10 ohms when measure with meter
or is possible the chip next to... -
Hi everyone,
I have this strange behaviour with Acer Aspire E5-574-52RH, i5 6200U, intel graphics, DA0ZRWMB6G0 Rev G, model ZRW.
Laptop came in for a SSD upgrade, took everything apart to install the SSD.
Everything started after modifying BIOS settings to boot UEFI instead of Legacy.
Laptop works fine, i installed windows 10 and drivers/updates, everything works ok(when it works)
The black screen problem is random, maybe 5 out 10 times, laptop remains with the black screen, no image
Symptoms are:
- random black screen after displaying Acer logo... -
So our beloved M60-C3 up and died the other day. I was not there, my wife mentioned that it came on, displayed the logo, then showed the right half of the screen white and fuzzy, with the left half of the screen ok. However when I got around to looking at it, the screen would not come on at all. The indicator LED will come on, then dim a bit. After a while, the LED might blink a bunch of times. I can't get it to be consistent to do that.
So I've got the back off and am checking voltages. The capacitors on the power supply board visually check out. No bulges or anything. They all show...
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