Howdy ...
When I first posted here I did a search to see if you were a member...
Got no results...
So , apparently you are hidden here also...
But , it's GREAT you are here...
GOOD to see you again....
OK..
I'll start a search for another Main Board...
There are/was several Main boards at eBay that look reasonable in price...
The 2 replacements I got are from eBay...
This board from ShopJimmy is has a slightly different part number than my board;=>.
[url]http://www.shopjimmy.com/vizio-3642-1792-0150-main-board-for-e420i-a0.htm[/url]
The board there has their number as;=>..
3642-1792-0150 >>(2C)<<...
Over the weekend , I tried to flex the 42" Vizio & I have to tell you that that TV is rugged..
I could not flex it at all....
I also took the TV partially apart to check on the lower end connections & the skinny PC board(s) at the bottom of the TV..
Each of the ribbons that go there have 3 more ribbons that go to the LED panel..
See 2 attachments below...
I could not see anything wrong with the ribbons ..
I applied thumb & finger...
OK , you're right...
Got caught up in optimism ..
I'll do the PC & flex test tomorrow & get back to you then...
IF you are not online tomorrow , have a GREAT day & weekend......
THANK you VERY , VERY much for ALL your GREAT help & advice......
Later...Ron.M......
[/B]Re: Vizio E420i-AO No pix NO sound & NO Menu !!!
I'm going to take a closer look at the lower end connections & the skinny PC board(s) at the bottom of the TV..
Also going to try the flex test & see what gives there...
Try & check both tomorrow...
Also;..
In the manual you graciously posted in post #7 there is a pix I'd like you to take a look at..
See attachment..
Please go to page #3 & take a look at the top right pix..
Do you think that that is what is wrong with my TV???...
The full number is;...
3642-1792-0150 (2D)
0171-2271-5032
There you go...
The board at Shopjimmy is;...
3642-1792-0150 (2C)
Does the "(2C)" sub for the ("2D)" ??...
Also , I noticed that in the 2nd pix from the left (& On the TV) the letters "ignal" appear center screen..
Does that vindicate the Main Board as being good ???
Or is the Tcon part bad ???
I'm trying to eliminate...
Ok , here you go..
All the pix below are in sequence..
First starting with the left ribbon...
In the far right pix there are some bright spots in the white part of the screen...
Those are due to the LED diffuser screens not being put back in their proper sequence..
IF we solve the current issue , then I intend to correct that error..
I think we are in agreement here..
My feeling is that IF the Main Board IS good . I should at LEAST see a Menu...
I can not see any images
Since there is no onscreen Menu , I can not scan for channels..
What say you ???
Later...Ron.M.......[/B]Re: Vizio E420i-AO No pix NO sound & NO Menu !!!
[B]budm;....
Yes...
I think we are in agreement here..
My feeling is...
There is nothing under the metal plate...
The ribbons go to connectors at the bottom...
NOT directly to the LED Panel , but , to a skinny circuit board that runs along the bottom of the TV... (Approx 6" , IF memory serves !!)
See attached pix..
BTW;...
I checked the connections when I cleaned the ribbons..
They [I]looked[/I] OK...
Later..Ron.M.......[/B]Re: Vizio E420i-AO No pix NO sound & NO Menu !!!
Yes & no..
See pix below...
There is NO TCON Board as such..
The Tcon circuitry [I]MAY[/I] be on the Main Board..
I cleaned both ends from the Main Board to the LED panel with 91% Isopropyl Alcohol...
Did not drench them , but , gave each plenty of time to dry out before reconnecting...
I will try to flex the screen sometime tomorrow & get back to you then... ...
Are you saying that the Tcon board is the problem ???
BTW;...
On another forum (ShopJimmy) & elsewhere , I read that "Horizontal" lines are always caused by a bad LED Panel..
These are vertical , so I presumed that the LED Panel was/is not the cause..Correct ???
Later...Ron.M... [/B]Re: Vizio E420i-AO No pix NO sound & NO Menu !!!
How am I supposed to see anything by removing the screen ???
PLEASE let's be nice !!!!
ALL I'm looking for is a LEGITIMATE second opinion !!!..
Please keep in mind the what goes around , comes around.......
Have a GREAT day & weekend..... ...
Later...Ron.M..... .. [/B]Re: Vizio E420i-AO No pix NO sound & NO Menu !!!
I'm re-posting this because I did NOT have the model number in the original post , it did NOT show up in the forums listings & I got a lackluster response...
NO OFFENSE INTENDED ReeceyBurger123 , but , I'd like someone who is an experienced tech to reply..
Thanks for your input...
"""Dear Person;...
First time posting here...
I'm a retired analog TV tech with 50+ years experience , 20 of which are self employed owning my own business....
That said...
Sorry about the delay in responding...
For some reason I did NOT get an email notice that someone replied here...
I appreciate your opinion...
The reason that I think the LED panel is OK is that with the original Main Board I got those vertical lines on BOTH sides of the screen..
Along with the shading on the right side , etc...
Freeze spray removed all the vertical lines & almost restored the pix to normal...
With the replacement Main Board I get...
First time posting here...
I'm a retired analog TV tech with 50+ years experience , 20 of which are self employed owning my own business....
That said...
I have been battling repairs on my Vizio model E420i-AO LED TV..
It was given to me by my ex-landlord's lady friend...
The original symptom was No pix, NO sound & NO menu...
Did the "flashlight test" & there was NO sign of video of any sort or a Menu...
The TV was turning...
It seems that some of you (mattstolte , for example) are wannebe Electronic Engineers !!!
The BEST way to solve this problem is to REPLACE the strips with the CORRECT ones...
This is done by looking ON EACH strip for a PART NUMBER & then searching for a supplier..
Need help with that , just ask !!!!...
My Vizio has 4 (FOUR) different types of strips that are NOT interchangeable...
Subbed , yes , easily remanufactured from recycled crap , HELL NO !!!
I predict...
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