Success! I found a video which mentioned to select off-protect, erase, write and verify for the writing of the file. Once I did that I had a picture and the TV is now working! Thank you so much for the assistance, one less thing in our landfill!

Also you are correct I was pulling the wrong firmware from the Vizio site. I just overlooked it. Apparently there isn't one available on their site, or at least with my serial number.

I was able to write the file but now the power LED isn't even coming on. When I try to verify the dump and the IC I am getting Verification error on address: 00002F38. Do I have the correct settings for the write SPI?

By the way, do I need to erase the IC each time I write to it?

I'm sorry if I am confusing things. Earlier I had interpreted that the firmware somehow became corrupted based off of my troubleshooting. So I want to apply the latest firmware to re-flash the corrupted firmware and looked on the Vizio site. The updated file is something like 380 megs compared to this 8 meg file on the existing IC. Would this resolve the issue? I am just not certain what my path on resolving this issue is. Attached is the dumped file from the IC.

Chipset is winbond 25Q64FVSIG 1213

Thanks

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Thank you so much and sorry for all of the noob questions. I have everything hooked up and backed up the firmware. When I try to apply the latest version I am getting an error that the "File size is larger than IC size"

I have the mainboard out but am having difficulty removing the metal shield to get access to the eeprom. There are several tabs that go to the back of the motherboard. Do I heat them up with my solder iron or is there something else?

Thanks for the reply. Does this mean I have to remove the existing one or is there a way to force the firmware update?

Hi All,

I have a Vizio E320-A1 which lost sound and picture. The power LED comes on and stays on but nothing else works. I am not able to power it off unless I unplug it.

Here are the voltages when the power is on

1 - 5.25
2 - 5.25
3 - 0
4 - 4.8
5 - 25
6 - 25
7 - 0
8 - 0
9 - 0
10 - 12
11 - 12
12 - .9
13 - .5

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Re: LG 42in LG 42LM3700 Not powering on

Just wanted to let everyone know that I ordered a replacement power board and that has resolved the issue.

Re: LG 42in LG 42LM3700 Not powering on

Here is an update. I was able to find a Youtube video on testing the voltage and found the following:

While off the PWR-ON pin shows 3.5-3.6V. Turning the unit on the PWR-ON pin drops to 0V.
While on I tested a few of the 12V on the left side of the right connector and none of the three showed any voltage. Also the 24V on the left side and right side had no voltage. The only pins that showed any voltage was the four (2 left and 2 right) 3.5V which all showed between 3.5V and 3.6V while the TV was on and off. This appears...

Re: LG 42in LG 42LM3700 Not powering on

Hi,

I am having the same problem with this TV as well. Nomoresonys you mention that I should test each pin which is in the upper left two row of pins. When I use my mulimeter I assume that I need to test each one with the positive terminal. Where do I hook up the negative to? Also I see the largest value is 24V. So I just need to set the mulitmeter to something that is above 24V correct?

Thanks,
Nick

Hi All,

I'm trying to find replacements for a Rubycon 6.3V 2200UF. It appears to be a MCZ series. Do I need to find one with the exact same series or will any cap with a 6.3V 2200UF work?

Thanks,
Nick