Re: e701i-a3 no picture but backlights
The screen frame froze, got really dark and reddish, and then slowly faded out starting around the outsides and moved in to the center until the picture was completely gone. Screen still had a faint glow from the backlight and I could see from the back that the LED was on and I also still hear audio perfectly. I could change channels/volume from the set buttons as well as the remote, I could change inputs, etc.
The only reset procedure I've found came from Vizio tech support. They had me unplug the set and then hold the power...
MREasyGuns
Member
Last Activity: 06-09-2016, 03:27 PM
Joined: 03-22-2016
Location: Pennsylvania
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Re: e701i-a3 no picture but backlights
Received the replacement board. It tested similarly to the old one with the multimeter. Got the same exact results... no picture at all with left or right side unplugged, LED backlight works. I didn't test for audio (it worked before) because I was trying to unplug quickly when the Vizio V didn't appear.
Not sure where to go from here and I'm not sure I want to sink any money throwing parts at it.Leave a comment:
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Re: e701i-a3 no picture but backlights
The LED backlight is definitely on.
I'm thinking maybe I just tested the T CON board wrong. My hands shake really bad and I was having difficulty withe the really small pins on the transistor. I'm still waiting on UPS for the replacement so I guess we'll see what happens when that shows up.Leave a comment:
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Re: e701i-a3 no picture but backlights
Ah I think I see what you mean about the tab driver IC. I inspected them all again and didn't see anything that appears damaged to me.
Tested the power board where the pins pins are that go out to the main board. (See pics). I used one of the ground pins for my black lead.
Results are:
T CON_ON: 3.2V
12V T CON: 12.2V
NC: No Cable
LED-BR: 2.8V
LED-ON: 3.2V
BL-ERR: 0V
12V REG: 12.29V
12V REG: 12.29V
GND
GND
GND
12V AUDIO: 12.29V
PS-ON:...Last edited by MREasyGuns; 03-23-2016, 02:28 PM.Leave a comment:
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Re: e701i-a3 no picture but backlights
First picture is the other side of the driver board
D/Ced left side first and then right side. Both times I came up with LED backlight on but no picture. First time I unplugged very quickly, second time I said screw it and snapped a photo....Leave a comment:
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Re: e701i-a3 no picture but backlights
The first two photos are the left and right drivers. Those are the correct ones to inspect right?
I haven't tested the corner ribbons yet. Before I do, would you be able to verify that the third photo indicates the ribbon that I should disconnect? They are located at the bottom corners of the set....Leave a comment:
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Re: e701i-a3 no picture but backlights
Lets see if I attached the photos correctly (I'm on mobile at the moment so it's a little wonky). If not I'll edit when I get back to my PC.
One picture is of one of the gold tabs attached to the side panel
The other two are my multimeter, 0.L being with the leads touching nothing and the 00.00 being the leads touching each other. I couldn't adequately get a photo while actually testing the board. I'll see if I can get help from someone later today....Last edited by MREasyGuns; 03-23-2016, 10:36 AM.Leave a comment:
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Re: e701i-a3 no picture but backlights
Also I meant to say that the only time I get any reading (meter stayed at 0.L) except on KOhms with the Black lead on the center pin and the red lead on the top pin with a reading of 2.5.
Edit: Scratch what I said. I found an "auto" mode on my multimeter.
Looking at the board upside down according to how it's attached to the TV:
With the black lead on the left center pin
Red lead on top right pin: 2.2 kOhms (small k)
Red lead on bottom right pin: 9.5 MOhms
...Last edited by MREasyGuns; 03-22-2016, 11:17 PM.Leave a comment:
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Re: e701i-a3 no picture but backlights
Ok so I have my board out and I'm trying to test the resistance of the transistor in question. Problem is I'm not sure I know how to read this multimeter.
I have a range setting. I can set it to Ohms, KOhms, and MOhms. I get readings for KOhms and MOhms but I get no change in the reading for Ohms. The stock reading is 0.L
When I touch the leads together I get 00.00 except when I'm on the regular Ohms range and I get 000.5
Can you help me understand what setting I need to have this on when I test the ...Leave a comment:
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Re: e701i-a3 no picture but backlights
Thanks for the reply! I'll tear in to it tonight and do as you suggested!
A few questions, if I wanted to test the transistor in question on my existing board, do I test while it is and the TV is plugged in? Sorry if this has been answered already but I'm a dummy with these things and a lot of this info is Greek to me.
Next, if I find out the "new" board is already bad (as I'm assuming most of the boards being sold were just parted out from other similarly broken TVs?) I purchased through Amazon and...Leave a comment:
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Re: e701i-a3 no picture but backlights
Hi, I'm new here. What brought me is I have a E701i-A3 that crapped out on me last night.
Picture froze and then slowly faded to black. LED backlight works. Audio works. I can adjust the volume, and I can navigate some things from memory.
I ordered a new tcon board this morning based on advice from another forum. New board will arrive tomorrow.
I'm reading here about some driver tabs? I've tried to read as much as I can but the info is pretty overwhelming.
Question is, is there any way...Leave a comment:
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